Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 15633 (2005): Automotive vehicles - pneumatic tyres forpassenger car vehicles - diagonal and radial ply [TED 7:Automotive Tyres, Tubes and Rims]

IS 15633:2005[Superseding IS 10914 (Part 1) ;1991;1S 10914“(Part 3) :1991, IS 10914 (Pati 5) :1095 and

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IS 12441 (Part 1j: 19951

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Indian Standard

AUTOMOTIVE VEHICLES — PNEUMATIC TYRES FORPASSENGER CAR VEHICLES — DIAGONAL AND

RADIAL PLY — SPECIFICATION

ICS 83.160.10

0 BIS 2005

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

December 2005 Price Group 9

-Automotive Tyres, Tubes and Rims Sectional Committee, TED 7

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the AutomotiveTyres, Tubes and Rims Sectional Committee had been approved by the Transport Engineering Division Council.

The standards on pneumatic tyres of automotive vehicles which were earlier issued in various parts of standardshave-now been superseded and issued in three standards. The other standards tithe series are:

IS No. Title

15627:2005 Automotive vehicles — Pneumatic tyres for two and three-wheeled motor vehicles —Specification

15636:2005 Automotive vehicles — Pneumatic tyres for commercial vehicles — Diagonal and radialply — Specification

The requirements of terms, definitions, nomenclature and methods of test, which were earlier covered by separate“IndianStandards, have been included in the above standards.

This series of standards supersedes the following Indian Standards:

IS No.

10914 (Part 1): 1991

10914 (F%rt2) :1992

10914 (Part 3): 1991

10914 (Part4) :1992

10914 (Part 5): 1995

11157:1984

12151:1987

12441 (Part 1) :1995

Title

Automotive vehicles — Pneumatic tyres: Part 1 Terms definitions and nomenclaturefirst revision)

Automotive vehicles — Pneumatic tyres — Specification: Part 2 Truck, bus and lighttruck tyre — Diagonal ply (second revision)

Automotive vehicles — Pneumatic tyres — Diagonal ply — Specification: Part 3Passenger car tyres (first revision)

Automotive vehicles — Pneumatic tyres —-Specification: Part 4 Scooters and scooterderivates — Diagonal ply (second revision)

Automotive vehicles — F!neumatic tyres: Part 5 Method of test for diagonal ply andradial ply tyres @st revision)

Specification for pneumatic tyres for mopeds — Diagonal ply

Motorcycles tyres, diagonal ply — Specification

Automotive vehicles — Pneumatic tyres: Part 1 Passenger car tyres — Radial ply —Specification @st revision)

In preparing this standard, assistance has beenderived from the following standards:

AIS-044 (Part 2] Automotive vehicles — Pneumatic tyres for passenger car vehicles

ECE-R 30 Uniform provisions concerning the approval of pneumatic tyres for motor vehicles andtheir trailers

Following Indian Standards may be referred for valve, valve accessories and terminology of automotive v-ehicles:

X3No. Title

9081:2001 Automotive vehicles — Valves and valve accessories for pneumatic’tyres — Specification(third revision)

10939:2000 Designation system for tyr~ tube valves for automotive vehicles (first revision)

14272 (Part 1): 1995 Automotive vehicles — Types — Terminology: Part 1 Three and four wheelers

(Continued on third cover)

AMENDMENT NO. 1 AUGUST 2009

TO

IS 15633 : 2005 AUTOMOTIVE VEHICLES ― PNEUMATIC TYRES

FOR PASSENGER CAR VEHICLES ― DIAGONAL AND

RADIAL PLY ― SPECIFICATION

(Page 1, clause 1) ― Substitute the following for the existing clause:

‘1 SCOPE

This standard specifies the general, dimensional and performance requirements of new diagonal and radial

ply pneumatic tyres designed primarily, but not only for vehicles in categories M1, T1 & T2. However, it

does not apply to tyres designed for:

a) the equipment of vintage cars, and

b) competitions.’

(Page 6, clause 6.2.5.1) ― Add the following at the end:

‘If a Tubeless tyre version is approved its Tube version shall also deemed to be approved.’

(Page 14, clause D-1.2) ― Substitute the following for the existing matter:

‘Inflate it to the appropriate pressure as given (in kPa) in Table 13.’

(Page 15, Table 13) ― Substitute the following for the existing:

Table 13 Inflation Pressure for Load/Speed Performance

(Clauses 4.2.1 and D-1.2)

(Page 16, Annex F, clause F-1.1) ― Substitute the following for the existing:

‘F-1.1 The test device, a standard block as shown in Fig. 2 and Fig. 3 (for reference), shall be used and is

forced against tyre side wall.’

Price Group 1

1

Diagonal (Bias-Ply) Tyres, kPa Radial Tyres, kPA Bias-Belted Tyres, kPa Sl

No.

Speed

Category

4 Ply 6 Ply 8 Ply Standard Reinforced Standard

(1) (2) (3) (4) (5) (6) (7) (8)

i) L, M, N 230 270 300 240 280 ―

ii) P, Q, R, S 260 300 330 260 300 260

iii) T, U, H 280 320 350 280 320 280

iv) V 300 340 370 300 340 ―

v) W ― ― ― 320 360 ―

vi) Y ―- ― ― 320 360 ―

Amend No. 1 to IS 15633 : 2005

(Page 17, Fig. 2) ― Substitute the following for the existing figure:

All dimensions in millimetres.

FIG. 2 BEAD UNSEATING FIXTURES

(Page 17, Fig. 2) ― Insert the following new figure after Fig. 2:

3A Material: Cast Aluminium 355 T-6 Condition Finish – 1.3 Micrometer (µm)

All dimensions in millimetres.

FIG. 3 BEAD UNSEATING BLOCK ― Continued

2

Amend No. 1 to IS 15633 : 2005

3B Material: Cast Aluminium 355 T-6 Condition Finish – 1.3 Micrometer (µm)

All dimensions in millimetres.

FIG. 3 BEAD UNSEATING BLOCK

(Page 19, Annex H) ― Substitute the following for the existing:

Numeric 4.50 ― 12 4PR

Ply Rating

Nominal Rim Diameter

Code

Construction Code

Diagonal

Nominal Section Width

Code

Metric 215 70 S R 15

Nominal Rim Diameter

Code

Construction Code Radial

Speed Category Symbol

Nominal Aspect Ratio

Nominal Section Width

Code

Alpha F 78 ― 15

Numeric Nominal Rim Diameter

Code

(Bias) Construction Code

Diagonal

Nominal Aspect Ratio

Load

Alpha B R 78 14

Numeric Nominal Rim Diameter

Code

(Radial) Nominal Aspect Ratio

Construction Code Radial

Load

(TED 7) Reprography Unit, BIS, New Delhi, India

3

IS 15633:2005

Indian Standard

AUTOMOTIVE VEHICLES — PNEUMATIC TYRES FORPASSENGER CAR VEHICLES — DIAGONAL AND

RADIAL PLY — SPECIFICATION

1 SCOPE

This standard specifies the general, dimensional andthe performance requirements of new radial ply anddiagonal ply pneumatic tyres, designed for vehicles incategories M 1, T1 and T2.

2 REFERENCE

The following standard contains provision, whichthrough reference in this text constitutes provision ofthe standard. At the time of publication, the editionindicated was valid. All standards are subject torevision and parties to agreements based on thisstandard is encouraged to investigate the possibilityof applying the most recent edition of the standardindicated below:

IS No. Title

10694 Automotive vehicles — Rims —(Part 2): 1996 General requirement: Part 2

Passenger car (first revision)

3 TERMS, DEFINITIONS AND NOMENCLATURE

3.1 Tyre — An annular toroidal shaped inflatableenvelope made of elastic -materials, natural andlorsynthetic rubber or a blend thereof, reinforced with atextile/steel cord fabric casing enclosing multi-coil wireheadings. The tyre is so made that it can be used bymounting and inflating on the appropriate rim.

3.1.1 Type of Pneumatic Tyre, means a category ofpneumatic tyres which do not differ in such essentialrespects

a)

b)

c)

d)

e)

f)

as:

Manufacturers name and brand name;

Tyre-size designation;

Category of use:

1) Normal Normal road use ~res;

2) Special Special-use tyre, for example,Tyre for mixed use (both on and off theroad); and

3) Restricted speed Snow tyre;

Structure [diagonal (bias-ply) (radial)];

Speed category;

Load indices or maximum load and ply rating;and

g) Nominal Cross-section:“fittedto a specified rim.

Dimension when

3.1.2 The nomenclature used is given in Fig. 1.

3.2 Snow Tyre — Tyre whose tread pattern and whosestructure are primarily designed to ensure in mud and-fresh or melting snow a performance better than of anordinary (road-type) tyre. The tread pattern of a snowtyre generally consists of groove (rib) andlor solidblock elements more widely spaced than on an ordinary(road-type) tyre.

3.3 Structure — Tyre technical characteristics ofthe tyre’s carcass. The following structu~es aredistinguished in particular.

3.3.1 Diagonal or Bias-Ply — Stmcture in which theply cords extend to the beads and are laid at alternateangles of substantially less than 90° to the .centre lineof the tread.

3.3.2 Bias-Belted — Structure of diagonal (bias-ply)type in which the carcass is restricted by a beltcomprising two or more layers of substantiallyinextensible cord material laid at alternate angles closeto those of the carcass.

3.3.3 Radial— Structure in which the ply cords extendto the beads and are laid substantially at 90° to thecentre lineofthe tread, the carcass being stabilized byan essentially inextensible circumferential belt.

3.3.4 Reinforced or Extra Load — Tyre structure inwhich the carcass is more resistant than that of thecorresponding standard tyre.

3.4 Bead — Part of a pneumatic tyre which is of suchshape and structure as to fit the rim and hold the tyreon it (see Fig. 1).

3.5 Cord — Strands forming the fabric of the plies inpneumatic tyre.

3.6 ply — Layer of rubber-coated parallel cords (seeFig. 1).

3.6.1 P& Rating—Tyre with its maximum recommendedload when used in a specific type of service. It is anindex of tyre strength and does not necessarilyrepresent the number of cord plies in the tyre.

IS 15633:2005

---r

NOMINAL RIMDIAMETER (d)

I

T_RIM WIDTH (A)

F SECTIONWIDTH (S)

* OVER-ALLWIDTHm

FIG. 1 NOMENCLATUREOF TYRE

3.7 Carcass — Part of a pneumatic tyre.other than thetread and the rubber side walls whi~, when inflated,bears the load.

3.3 Tread — Part of a pneumatic tyre which comesinto contact with the ground, protects the carcassagainst mechanical damage and contributes to groundadhesion.

3.9 Side Wall — Part of a pneumatic tyre between thetread and the bead.

3.10 Lower Area 01 Tyre — Area included betweenthe point ofmaximum section widtkofa tyre and areadesigned to be covered by the edge of rim.

3.11 Tread Groove — Space between two adjacentribs or blocks in the tread pattern.

3.-12 Section Width — Linear dist~ce between theoutside of the side walls of an inflated pneumatic tyreexcluding elevations due to labelling (marking),decoration or protective bands or ribs.

3.13 Overall Width — ‘Linear distance between theoutsides of the sidewalls of an inflated pneumatic tyre,including labelling (marking), decoration andprotective bands or ribs.

3.14 Section Height — Distance equal to half thedifference between the outer diameter of the tyre andthe nominal rim diameter.

3.15 Nominal Aspect Ratio (Ra) — Hundred timesthe ratio of the nominal section height to the nominalsection width of the tyre on its theoretical rim.

3.16 Outer Diameter — Overall diameter of aninflated new pneumatic tyre.

3.17 Tyre-Size Designation — The descriptioncontaining the following:

a) Nominal tyre section width code;b) Nominal aspect ratio; andc) Nominal rim diameter code.

3.18 Nominal Rim Diameter — Diameterof the rimon which a tyre is-designed to be mounted.

3.19 Rim — Support for a tyre-and-tube assembly orfor a tubeless tyre, on which thetyre beads are seated[see IS 10694 (Part 2)].

3.20 Measuring Rim — Rim on which a tyre shall befitted for dimensional measurement purposes.

3.21 Test Rim — Rim on which a tyre is required tobe fitted for testing.

2

“IS 15633:2005

3.22 Chunklng — Breaking away of pieces of rubberfrom the tread.

3.23 Cord Separation — Parting of the cords fromtheir rubber coating.

3.24 Ply Separation — Parting of adjacent plies.

3.25 Tread Separation — Pulling away of the treadfrom the carcass.

3.26 Tread-Wear Indicators — Projections withinthe tread grooves designed to give a visual indicationof the degree of wear of the tread.

3.27 Load Index — A number associated to thereference mass a tyre can carry when operated inconformity with requirements governing utilizationspecified by the manufacturer. The list of these indicesand their corresponding load given in Table 1 (seeAnnex A).

3.28 Speed Category — Maximum speed which thetyre can sustain, expressed by speed category symbolgiven in Table 2 (see Annex A).

3.29 Tread Pattern Grooves

3.29.1 Principal Grooves — Wide grocwes positionedin the central zone of the tyre tread, which have thetread-wear indicators located inside them (see 3.26).

3.29.2 Secondary Grooves —Supplementary groovesof the tread pattern which may disappear in the courseof the tyre’s life.

3.30 Maximum Load Rating — Maximum mass thetyre is rated to carry.

3.30.1 For speed not exceeding 210 Icrrdbthe maximumload rating shall not exceed the value associated withthe load index of the tyre.

3.30.2 For speed higher than 210 km/h, but notexceeding 240 km/h (tyres classified with speedcategory symbol ‘V’) the maximum load rating shallnot exceed the percentage of the value associated-withthe load index of the tyre with reference to the speedcapability of the car to which the tyre is fitted given inTable 3.

Table 3 Maximum Lead Rating

S1No. Maximum Speed “MaximumLoad Ratingkmilr Percent

(1) (2) (3)

i) 215 98.5ii) 220 97iii) 225 95.5iv) 230 94v) 235 92.5vi) 240 91

For intermediate maximum speeds linear interpolationsof the maximum load rating are allowed.

3.30.3 For speed higher than 240 km/h (tyres classifiedwith speed category symbol ‘W’) the maximum loadratin-g shall not exceed the percentage of the valueassociated with the load index of the tyre with referenceto the speed capability of the car to which the tyre isfitted given in Table 4.

Table 4 Maximum Load Rating

sl Maximum Speed Maximum Load RatingNo. krrr/h Percent

(1) (2) (3)

i) 240 100ii) 250 95iii) 260 90iv) 270 85

For intermediate maximum speeds linear interpolationsof the maximum load rating are allowed.

3.30.4 For speeds higher than 270 km(h (tyresclassified with speed -category symbol ‘Y’) themaximum load rating shall not exceed the percentageof the value associated with the load index of the tyre,with reference to the speed capability of the car towhich the tyre is fitted given in Table 5.

Table 5 Maximum Load Rating

SI Maximum Speed Maximum -Load RatingNo. kmh Percent

(1) (2) (3)

i) 270 100ii) 280 95iii) 290 90iv) 300 85

NOTE — For intermediate maximum speeds linearinterpolations of maximum load rating are allowed.

3.30.5 For -speeds lower or equal to 60 km/h themaximum load rating must not exceed the percentageof mass associated with the load index of the tyre withreference to the maximum design speed of the vehicleto which the tyre is to be fitted given in Table 6.

Table 6 Maximum Load Rating

SI Maximum MaximumL,oad L P. IncreaseNo. , Speed Rating

kmh Percent kPa

(1) (2) (3) (4)

i) 25 142 50ii) 30 135 40iii) 40 125 30iv) 50 115 20v) 60 110 10

3.30.6 For speeds in excess of 300-km/h, the maximumload rating must not exceed the mass specified by thetyre manufacturer with reference to the speed capacityof the tyre. For intermediate speeds between 300 ladh

3

1S 15633:2005

and the maximum speed permitted by the tyremanufacturer, a.linear interpolation of the maximumload rating applies.

3.31 Theoretical Rim — An imaginary rim the widthof which would be X times the nominal section widthof a tyre. The value of X shall be specified by the tyremanufacturer.

4 TEST REQUIREMENTS

4.1 Tyre Dimensions

4.1.1 Tyre dimensions and profiles shall be compatiblewith the appropriate rims. The tyre dimensions, namelysection width and outer diameter shall meets therequirements given in Tables 7, 8, 9, 10, 11 and 12.Method of measurement is given in Annex C.

4.1.1.1 Section width of tyre — Tyre size designationshall be as per Tables 7 to 12 given in Annex B, thesection width shall be deemed to be that opposite thetyre size designation in those tables.

NOTE — Adjustment to tyre section width/overall width —Within the parameters of specified permissibility of a wider ornarrower rim than the recommended rim size, the guide]inesfor the necessary adjustment are — Sectional width or overallwidth: 5 mm increase or reduction (as applicable) for every0.50 difference in nominal rim width,

4.L1.2 Tyre outer diameter

Tyre size designation shall be as per Tables 7 to 12given in Annex B. The outer diameter shall not exceedthe minimum and maximum diameter values specifiedin Annex B.

4.1.2 For the sizes listed in Annex B, but tolerance arenot given and the tyres sizes which are not listed inTables 7 to 12 of Annex B, the section width and outerdiameter shall be calculated by using followingformulae,

4.1.2.1 Section width of tyre

4.1.2.1.1 The section width shall be calculated by usingfollowing formula:

S=S,+K(A-A,)where

S = section width expressed measured onmeasuring rim, in mm;

S, = nominal section width as set out on the tyresidewall in the tyre size designation, in mm;

A = width of the measuring rim as shown by themanufacturer in the technical specification,in mm; and

,4,= .L,.,...:..:--l ..:- . . . ..I.L . . ..-...... --A :- -–UICXJIGL1&iU 11111 WIUU1 GA~IGSSCU, 111 111111.

A, shall be taken to equal S, multiplied bythe factor X as specified”by the manufacturer,and K shall be taken to equal 0.4.

4.1.2.1.2 For the existing types of tyres whosedesignation is given in COI2 of Tables 7 to 12 ofAnnex B, the section width shall be deemed to be thatgiven opposite the tyre designation in those tables.

4.1.2.1.3 The actual measured overall width of the tyremay be less than the section width determined asdetailed in 4.1.2.1.1 and 4.1.2.1.2.

4.1.2.1.4 The measured overall width may exceed byvalue of 4 percent in case of radial ply tyre and by 6percent in case of diagonal (bias-ply) tyres.

4A.2.2 Outer diameter of the tyre

4.1.2.2;1 The outer diameter of the tyre shall becalculated by using fotlowing formula:

D=d+2H

where

D = outer diameter expressed, in mm;

d = nominal rim diameter expressed, in mm;

H = nominal tyre height = S, x 0.01 R,;

S, = nominal section width; and

R.= nominal aspect ratio as set out in thedescription on the tyre sidewall.

4.1.2.2.2 For the existing types of tyres whosedesignation is given in co} 2 of Tables 7 to 12 ofAnnex B, the outer diameter shall be deemed to bethat given opposite the tyre designation in thosetables.

4.1.2.2.3 The outer tyre diameter-shall not be outsidethe minimum and maximum diameter values obtainedfrom the following formulae:

DMin= d + (2H x a)

D ~,X=d+(2HXb)

where

a)

b)

c)

d)

For the sizes listed in Annex B

H= 0.5 (D – d,) for references (see 4.1.2.2.1)

For other sizes which are not listed in Annex B

Hand dare as defined in-4.l.2.2.l

Coefficients a and b are respectively

Coefficient a = 0.97Radial Diagonal

Coefficient b for 1.04 1.08

ordinary (road type)normal use tyres

For snow tyres the overall diameter (DMJestablished in conformity with the above maybe exceeded by 1 percent.

4.2 Load/Speed Performance Test

4.2.1 The sample shall conform to the requirements

4

IS 15633:2005

given in 4.2.3 and 4.2.4 when tested as per the methodgiven in Annex D (see Table 13).

4.2.2 Where application is made for tyres identifiedby means of letter code ‘ZR within the size designationand suitable for speed over 300 kmfh, the above loadJspeed test is carried out on one tyre at the load andspeed conditions marked on the tyre. Another loadlspeed test must be carried out on a second sample ofthe same tyre type at the load and speed conditionsspecified as maximum by the tyre manufacturer.

4.2.3 A tyre which after undergoing the loadlspeedtest does not exhibit any tread separation, plyseparation, cord separation, chunking or broken cordsshall be deemed to have passed the test. However, atyre marked with speed category symbol ‘Y’ which,after undergoing the relevant test, does exhibit partialchunking due to the specific test conditions is deemedto have passed the test.

4.2.4 The outer diameter of tyre measured at least 6 hafter the load/speed performance test, shall not differfrom the outer diameter as measured before the test bymore than &3.5 percent.

4.3 Endurance Test

4.3.1 The sample shall conform to the reqtiirementsspecified in 4.3.2 when tested as per the method givenin Annex E (see Table 14).

4.3.2 A tyre which after undergoing the enduranceperformance test shall not exhibit any tread separation,ply separation, cord separation, chunking or brokencords.

4.4 Bead Unseating Resistance Test for TubelessTyre

4.4.1 Tubeless tyre sample shall conform to therequirements specified in 4.4.2 and 4.4.3 (asapplicable) when tested as per the method given inAnnex F.

4.4.2 The minimum bead unseating resistance valueat any measuring point -shall not be less -than thevalue given in Annex F (see Table 15 and Table 16as applicable).

4.4.3 In the case of the tyre of which the load capabilityindex is not madced, it shall be classified according tothe mzximum load capability corresponding to loadcapability index.

4.5 Tread-Wear -Indicators

4.5.1 The pneumatic tyre shall include not less thansix transverse rows of wear indicators, approximately

“ equally spaced and situated in the principal grooves ofthe tread. The tread-wear indicators shall be such that

these cannot be confused with the rubber ridgesbetween the ribs or blocks of the tread. However, inthe case of tyres dimensions appropriate for mountingon rims of a nominal diameter code < 12 or less,minimum four numbers tread-wear indicators shall beaccepted.

4.5.2 The tread-wear indicators .must provide.a means

of indicating with a tolerance of ~~’~ mm, when thetread grooves are no longer more thh 1.6 mm deep.

4.5.3 The height of tread-wear indicators is determinedby measuring the difference between the depth, fromthe tread’s surface, to the top of the tread-wear indicatorand to the bottom of the tread groove close to the slopeat the base of the tread-wear indicator.

NOTE — The tyre shall be considered unsafe for service onroad when remain worn skid depth~eaches minimum value of1.6 mm at any part of the tread circumference.

4.6 Tyre.Strength Test

4.6.1 The sample when tested as per the method givenin Annex G shall meet the requirements specified inTable 17 and Table 18 (as applicable).

5 MARKINGS

Tyre shall be permanently and legibly marked on boththe sides of their sidewalls in the case of symmetricaltyre and at least on the outer sidewall in the case ofasymmetrical tyre shall bear following markings:

a)

b)

c)

d)

5

Make (manufacturers name) or trade-nameshall be placed at least on one side wall;

Tyre size designation given in 3, 17;

An indication of the structure as follows:

1)

2)

3)

4)

On diagonal (bias-ply) tyres: no markingor character ‘_’, or the letter ‘D’ placedin front of the rim-diameter marking.

On radial-ply tyres: the letter ‘R placedin front of the rim-diameter marking and,optionally, the word ‘RADIAL’.

On bias — Belted tyres, the letter ‘B’placed in front of the rim-diametermarking, and in addition the word ‘BIAS-BELTED’ .

On radial— Ply tyres suitable for speedshigher than 240 km/h the letter ‘R’,placed in front of the rim diametermarking, may be replaced with ‘ZR’.

The speed-category symbol (or symbols):

1)

2)

An indication of the tyre’s nominal speedcategory in the form of the symbol givenin 3.28.

Tyres suitable for -speeds in excess of300 km/h must be marked with the

IS 15633:2005

e)

f)

g)

h)

j)

k)

m)

n)

service description (load index andspeed symbol) corresponding to theperformance upto 300 km/h.

The inscription ‘M+S’ or ‘M.S’ or ‘M&S’ “inthe case of snow tyre;

The load-capacity indices given in Annex Am maximum load carrying capacity-and plyrating (if applicable);

Maximum permissible tym pressure in kPaor bar or kg/cm2 or any combination of thisunits;

The word ‘TUBELESS’ if the tyre.is designedfor use without an innerlube;

Manufacture’S Code (May be placed on oneside wall);

Week and Year code (Code only in the”formof ‘2504’ which indicates 25th week ofyear 2004) or Month and Year code ofmanufacture (Code only in the form of ‘MAR04’ which indicates March month of year2004);

In the case of tyres which can be regrooved,symbol ‘U’ at least 20 mm in diameter, or theword ‘REGROOVABLE’, -moulded on thesidewall; and

The inscription M% or M.S or M&S in thecase of a snow tyre.

5.2 Examples of tyre size designation given inAnnex H,

5.3 Tread-wear indicators marking shall be providedat minimum six/four (as applicable) places along thecircumference to give indication to the user for locationof tread-wear indicator.

5.4 The markings given in 5.1 shall be moulded intoor on the tyres. These shall be clearly legible andsituated in the lower area of the tyre on at least one ofits sidewalIs, except for the inscription given in 5.1.Thelayout for tyre markings is given in Annex J.

6 CRITERION FOR TYPE APPROVALiTYPETEST

6.1 Tyre(s) shall meet the test requirements when testedas per schedule given in Table 19.

6.2 Type Approval Procedure

6.2.1 Application for type approval to be submittedby the manufacturer.

6.2.2 The application for type approval shall containat least the technical information as specified inAnnex K. For type approval of tyre belonging.to onefamily of tyre, brand of the tyre to be selected for typeapproval shall be left to certi~ing authority. Worst case

selection shall be made at the discretion of thecertifying authority based on the family of tyresspecified in 6.2.5.2.

6.2.3 Changes in the technical specification of alreadytype approved tyres.

6.2.3.1 Every functional modification in technicalspecification declared in accordance with 6.2.2 shallbe intimated to the certifying authority

6.2.3.2 The certifying authority -may then consider,whethe~

a) Tyre with modification complies withspecified requirement, or

b) Any further verification is required.

For considering whether any fhrther verification isrequired or not (criteria for extension of type approval)specified in 6.2.5 shall be used.

6.2.3.3 In case of 6.2.3.2(b), checks for thoseparameters which are affected by the modifications,only need to be carried out.

‘6.2.4 In the event of6.2.3.2(a) or in the case of 6.2.3.2(b)after successfi.d compliance to the requirements, acertificate of compliance shall be validated for themodified version, as applicable.

6.2.5 Criteria for Extension of Type Approval

6.2.5.1 In case the changes cause the tyre to be outsidethe approved family/range of tyres, the verificationshall be carried out for establishing compliance of thechanged parameters to the requirements specified inthis standard.

6.2.5.2 Family/Range of tyres would mean tyres,which do not differ in the aspects listed below, buthaving different brand names/trade-name/tradedescriptions or trade-marks:

a)

b)

c)

d)

e)

o

g)h)

j)k)

m)

n)

6

Registered name of company;

Country of origin;

Location of manufacturing facility;

Application category (road or off road orsnow);

Construction type (standard or reinforced);

Structure (diagonal or radial or bias belted);

Tyre size designatio~

Speed category;

Tube or tubeless;

Load index (or load capacity);

Ply rating of diagonal ply tyres; and

Fabric material —Nylon/Polyester/Polymide -(one type).

IS 15633:2005

7 CONFORMITY OF PRODUCTION TESTS/ACCEPTANCE TESTS

7.1 Periodic testing and approval of each type of tyreas~er the approved family of tyres in 6.2.5.2 shall becarried out. The approval marking shall be made onlyon the tyres of that approved family and the same shallnot get extended to other families of tyres, unless tyresfrom out of that undergone the same testing and typeapproval for that family of tyre.

7.2 The authority which has granted type approval mayat any time verify the conformity control methodsapplied in each production facility. For each productionfacility, the normal frequency of these verificationsshall beat least once everytwo years.

7.3 The tyres approved under this standard shall be so

manufactured as to conform to requirements set forthin Table 20.

7.4 The production and quality assurance system shallmeet all the requirements laid out by certifyingauthority

8 BLS CERTIFICATION MARKING

The product may also be marked with the StandardMark.

8.1 The use of the Standard Mark is governed by theprovisions of the Bureau ofhdian Standards Act, 1986and the Rules and Regulations made thereunder. Thedetails of conditions under which the license for theuse of the Standard Mark may be granted tomanufacturers or producers maybe obtained horn theBureau of Indian Standards.

7

IS 15633:2005

ANNEX A

(Clauses 3.27 and 3.28)

LOAD INDICES AND SPEED CATEGORY SYMBOLS

Table 1 Load Indices

(Clause 3.27)

Load Corresponding Load Corresponding Load Corresponding Load CorrespondingIndex Maximum Load Index Maximum Load Index Maximum Load Index Maximum Load

to be Carried to be Carried to be Carried to be Carriedkg kg kg kg

(1) (2) (1) (2) (1) (2) (1) (2)

o123456789

101112131415161718192021222324252627282930

4546.247.548.75051.55354.556586061.56365676971737577.5.8082.58587.59092.59597.5

100103106

31323334353637383940414243444546474849505152535455565758596061

109112115118121125128132136140145150155160165170175180185190195200206212218.224230236243250257

62636465666768697071727374757677787980818283848586878889909192

265272280290300307315325335345355365375387400412425437450462475487500515530545560580600615630

93949596979899

100lQ11021031041051061071081091101111121131141151161171}8I 19120

650670690710-730750775800825850875900925950975

1000103010601090112011501 ~80121512501285132013601400

Table 2 Speed Category Symbol and Maximum Speed

(Clause 3.28)

Slmo. Speed Category Symbol Maximum Speedkmib

(1) (2) (3)

Oii)iii)iv)v)vi)vii)viii)ix)x)xi)xii)xiii)

LMN

:RsTuHvwY

120130140150160170180190200210240.270300

8

1S 15633:2005

ANNEX B

(Ch.fses4.1.1,4.1.1.1,4.1 .l.2and4.l.2)

GENERAL DATA AND LOAD INF-LATION PRESSURES

Table 7 Passenger Car Tyres (Diagonal Ply)’95’ Super Balloon Series 13 and Smaller Rim Diameter Codes General Dimension Data

(Clauses 4.1.1,4.1 .l.l,4.1.1.2,4.1 .2,4.1.2.1 .2and4.l.2.2.2j

SI Tyre Size Ply Rim New Tyre — InflatedNo. Designation Rating Ree Section Width,mm Overall Dkrrneter, mm Maximum ‘Maximum

m Design Minimum Maximum Design Minimum Maximum Load Cold I.P.’)

width width width diameter diameter diameter kg kPa

(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11) (12)

i) 5.20-10 3~J6 ~ 132 127 }40508

E500

E526

z275 210

ii) 4.50-123~J6 ~ 122 117 130

529 522E

545E 135

255 210

iii) 5.20-12 3)4J6 ~ 132 127 I40558

E550 576

E E310 210

iv) 5.20-13 3)4J6 ~ 132 127 140 582E

574 600= E

335 210

4Jv) 5.60-13 6

145 I39 I54G

600% G

592 619E

385 210

4Jvi) 5.90-13 6 —

I50 444 1594Y>J

616% G

607G

636 425 210

vii) 6.40-13 6’ ~163 156 I73

6425K or J G

633z E

664 465 210J

i] Inflation pressure.

Table 8 Passenger Car Tyres (Diagonal Ply)’95’ Super Balloon Series 14 and 15 Rim Diameter Codes General Dimension Data

(Clauses 4. I.l,4.1,1.1,4.1.1.2,4 .l.2,4.1.2.1.2 and4.l.2.22)

SI Tyre Size Ply Rim New Tyre — InflatedNo. Designation Rating Ree Section Width, mm Overall Dkuneter, mm Maximum Maximum

n Design Minimum Maximum Design Minimum Maximum Load Cold LP.l)

width width width diameter diameter diameter kg kPa

(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11) (12)

O3~J

5.20-14 6 ~132 127 140

*612 604

E G630 375 210

4Jii) 5.50-14 6 — 145 139 154

4~J626

E618

G645

E405 210

4Jiii) 5.90-14 6

150 144 159~ E

642G

633E

662 440 210

4Jiv) 5.60-15 6 —

145 139 1544~J G

650G

642G

669 425 - 210

4Jv) 5,90-15 6 —

150 144 I594~J G

668G 164

659 688 460 210

vi) 6.40=15 64~J 163 156 I73

5J G692

E E683 714 520 210

vii) 6.70-15 64~J 170 163 180T E

710-G G

700 733 560 210

1) Inflation pressure.

9

1S 15633:2005

Table 9 Passenger Car Tyres (Diagonal Ply)

’88’ Low Section Series General Dimension Data

(Chmses4.1.1,4.1.1 .1,4.1.1 .2, 4.1.2,4 .1.2.1.2 and4.1 .2.2.2)

SI Tyre Size Ply Rim New Tyre — InflatedNr). Designation Rating ‘Ret Section Width, mm Dverall Dh3rneter,mm Maximum Maximum

Alt Design Minimum Maximum Design Minimum Maximum Load Cold I.P.’]

width width width diameter diameter diameter kg kPa

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

i) 7.25-13 6 ~ g g g5)4J

654 644 677 545 210

5Jii) 7.00-14 6

178 171 1895~J— % iii

668194

659 690 545 210

iii) 7.50-145~J6 —

190 182 201

6J G 187688 678

56711 600 210

‘1 Inflation pressure.

Table 10 Passenger Car Tyres (Diagonal Ply)’82’ Super Low Section Series General Dimension Data

(C/auses 4.1.1,4.1.1 .1, 4.1.1 .2,4.1.2,4.1.2.1.2 and4.1 .2.2.2)

1 s] Tyre Size Ply I Rim I New Tvre — Inflated I

- ‘~No. Designation Rating

(1) (2) (3) (4) (5)

i) 5.65-124 4J 131z

ii) 6.15-134

4j4J 157z

iii) 6.95-145J

6 —178

5)4J E

6Jiv) 8.25-14 6 6K g

5)4J

‘‘ Inflation pressure.

Minimumwidth

(6)

126

151

171

176

200i%

139I

522 I 515

Ft=t=220 690 680215

mm I Maximum I Mazimum i

1daximum Load I Cold I.P.’)

diameter kg kPa II 1

(lo) I (11) (12)

600 340 165G G

658 515 2}0

713 660 210

Table 11 Passenger Car Tyres (Diagonal Ply)

Alpha-Numeric ’78’ Series G-eneral Dimension Data

(C/auses 4.1.1,4.1.1.1,4 .l.l.2,4.1.2,4.1.2 .l.2and4.1 .2.2.2)

SI Tyre Size Ply Rim New Tyre —.hstlatedNrs. Designation Rating Ree Section Width, mm Overall Diameter, mm Maximum Maximum

Design Minimum Maximum Design Minimum Maximum Load Cold I.P.’)

width width width diameter diameter diameter kg 4cPa

(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11) (12)

i) F78-154

5!4J 196 I88 206 697 565 180z

688 706z %

‘) Inflation pressure.

10

IS 15633:2005

Table 12 Millimetric Sizes of Passenger Car Tyres (Radial Ply)

General Dimension

(Clause.s 4.1.1,4.1.1.1,4 .l.l.2,4.l.2, 4.1.2.1.2 and4.1.2.2.2)

-s1 Tyre Sii Rec Rim ~ New Tyre— InflatedNo. Designation Measuring Section Width, mm

Rim isOverall Dknwter, mm Maximum Maximum

Undemored Design Minimum Maximum Design IWnimum Maximum LQsd Cold I.P?

width width width diameter diameter diameter kg kPa

(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11)

’80’ Series

4Ji) 145/80 R1O

145 139 152@ E K 157

486 479 493 325 240

3!4Jii) 135/80R12

1-33 128 140

T E E 145521 515 527 315 240

4Jiii) 145/80 R12

145 139 152~ 150 144 157 537 530 544 375 240

47iJ 157iv) 155f80R12

151 165

T E G G553 546 560 412 240

4Jv) 145/80-R13

.145 r39 152~ E 144 157

562 555 569 387 240

vi) lfi/80”R13 4%J157 151 165

E E E-6578 571 585 437 240

4!4J .165vii) 165/80 R13

158 173

-Y E G E594 586 602 487 240

5J 177 170viii) 175/80 R13

186

G = E K610 602 613 530 240

4Jix) 145/80 R14

145 139 152~ E E Y

588 581 595 412 230

4%Jx) 155/80 R14

157 151 165

T E G 170604 597 61-1 450 230

4%Jxi) 165/80 R14

165 158 173

T 6 163 178620 612 628 515 “240

5J 177xii) 175/80 R14

170 186

G E 175 191636 fi28 644 560 240

4!4J 165 158xiii) 165/80 R15

173

T E = K645 637 653 530 230

5%Jxiv) 195/80 R15

196 188 206

T % E G693 684 702 710 240

’75’ series

6Jxv) 215175R15

216 208 227~ 211 z 222

703 693 713 800 240

6%Jxvi) 235175R15

235 226 244

T z G 249733 722 744 925 240

6J 223xvii) 225/75 R16

214 234

m E % 239744 733 754 900 240

’70’ Series

145/70 R12 -&145

xviii)139 151

G G E509 503 515 325 240

4%Jxix) 155/70R12

157 151 163

%- 162 156 168523 516 530 365 240

11

1S 15633:2005

Table12 (Continued

Tyre Size Rec Rim SiiesDesignation Measur~ Section Width, mm

Rim isUnderscored ~~tin

slNo.

T

New Tyre — Inflated

OverallDhneter, mm Maximum Maximum

Design Mhmmn Maximum Load Cold I.P.))

diameter diameter diameter kg kpa

(7) (8) (9) (lo) (11)

534 528 540 345 240

zKlnimum Maximumwidth width

(5) (6)

xx)

155/70R13 4%J I 157m- E

xxi)

++

165/70 R13 > 1704!4J K

175/70 R13 5J 177G E

175/70.R14 5J 177m E

xxii)

xxiii)

I I

576 369 583 475 240170 I 184E %

I

602 595 609 500 240xxiv)

616 608 624 560 2405~J185/70 R14 _ I 189

6J Gxxv)

630 622 638 615 240195/70 R14 6J I 201G G

193 I 209E G

xxvi)

655 647 663 630 240=-H--l+193 ] 209xxvii)

xxviii)

Kilm697 688 706 800 240219 1-237

% 241

265/70 R15 8J I 272

ZTJ Gxxix) 753 742 764 1060 240

736 726 746 925 240235/70 R16 7J I 240&j E

230 I 250z z

xxx)

xxxi) 778 767 789 1120 240

++

265170R16 8J 272

m Z7

’65’ Series

155/65 R13 4%J 157--K E

=--Exxxii) 532 526 ’538 365 240

544 I 538 I 550 I 412 I 240xxxiii)

1 ! I )

570 563 577 515 240185/65 R13 5%J I 189

x- =181

I

197E% z

xxxiv)

Xxxv)

xxxvi)

570 564 576 437 240

++

165/65 R14 5J 170m G

175165R14 5J 177G E

185/65 R14 5%J 189

T z

584 577 591 475 240170

E

184

G

197E

209

ZE

xxxvii) 596 I 589 I 603 I 530 I 240

195/65 R15 6J I 201

m %635 627 643 615 240

647 639 655 670 240

552 545 559 450 240

Xxxvtit)

=4-=4-=m185/60 R13 5%J I 189z E

12

IS 15633:2005

Table 12 (Concluded)

+/

sl Tyre SizeNo. Designation

(1) (2)

xii) 185160R14

IecRim SizesMeasur~

Rlm isUnderscored

New Tyre — Inflated

Overall Dhsneter, mm I Maximum I MaximumSection Width, mm

*

m@i-diameter

(7)

578

Mksimum Maximum Load Cold I.P.lJ

diameter diameter kg kPa

(8) (9) (lo) (11)

571 585 475 240

(3)

5!AJ 189 I 181 1-197194 E 2026J

F 608 622 560 240201 1-1-193 209196 188 204

6J

5!AJ615

620 634 615 2406J5!4J

%-i-+

xliii) ] 205/60R15 627

652

664

676

I

6J 645 I 659 I 630 I 240-5!AJ

656 672 690 2406%J6J

221 1-1-212 230216 207 225

Xiv) 215/60 R16

668 684 750 2406%J 228 1-1-219 237.223 214 232

xlvi) 225160R16

xlvii) 255160R17

’55’ Series

6J

7!AJ

7J =-l-=-E738 729 I 747 I 925 I 240

=-H-=-k6%J 214 1-1-205 223209 200 218

xlviii) 205/55 RI 6 6326J

635 649 615 240xlix) 215/55 R16 642

F w 654 647 I 639 I 670 I 240

F’50’ Series

Ii) 225/50 R16 625 639 630 240w 632

T’45’ Series

Iii) 255/45 R17 662 655 671 750 2408%J8J

255 1-1-245 265250 240 260

‘)Inflation pressure.

13

ANNEX C

(Ckzuse 4.1.1)

METHOD OF MEASURING PNEUMATIC TYRES

C-1 Mount the tyre on the measuring rim specified bythe manufacturer and inflate it to a pressure of 3 to 3.5bar.

C--1.1 Adjust the pressure as follows:

a)

b)

c)

d)

Inflate standard bias-belted tyres to 1.7 bar(170 kPa),

Inflate diagonal (bias-ply) tyres tomaximuminflation pressure for that tyre size

Ply Pressure (&w)Rating Speed Category

L,M, N IP, Q, R, SIT, U, I-I,V

mInflate standard radial tyres to 1.8 bar(180 lcPa),

Inflate reinforced tyres to 2.3 bar (230 kPa),and

e) Inflate T-tyre temporary spare tyres; to4.2 bar.

C-2 Condition the tyre, mounted on its rim, at theambient room temperature for not less than 24 h.

C-3 Readjust the pressure to the level specifiedin C-1,1.

C-4 Measure the overall width by calliperat six equally.spaced points, taking the tliclmess of the protective ribsor bands into account. The highest measurement soobtained is taken as the overall width.

C-5 Determine the outer diameter by measuring themaximum circumference and dividing the figure soobtained by n (3.1416). The tyre overall diameter shallbe calculated by using the following formula:

DO=~7r

where

DO= tyre overall diameter, in mm; and

C = circumference of tyre trea~ in mm.

ANNEX D

(Clause 4.2.1)

PROCEDURE FOR LOAIYSPEED PERFORMANCE TESTS

D-1 PREPARING THE TYRE

D-1.l Mount a new tyre on the test rim specified bythe manufacturer.

D-1.2 Inflate it to the appropriate pressure as given (inbar) in Table 13.

D-1.3”The manufacturer may request, giving reasons,the use of a test-inflation pressure differing from thosegiven in D-1.2. In such a case the tyre shall be inflatedto that pressure.

D-1.4 Condition the tyre-and-wheel assembly at test-room temperature for not less than 3 h.

D-1.5 Readjust the tyre pressure to that specifiedin D-1.2 or D-1.3.

D-2 TEST PROCEDURE

D-2. 1 Mount the tyre-and-wheel assembly on a test

axle and press it against the outer face of a smoothwheel 1.70 m * 1 percent or 2.0 m ● 1 percent indiameter.

D-2.2 Apply to the test axle a load equal to 80 percentQf

a)

b)

c)

d)

Maximum load rating equated to the loadcapacity index for tyres with speed symbolsL to H inclusive.

Maximum load rating associated with amaximum speed of 240 km/h for tyres speedsymbol V (see 3.30.2).

Maximum load rating associated with amaximum speed of 270 km/h for tyres withspeed symbol W (see 3.30.3).

Maximum load rating associated with amaximum speed of 300 km/h for tyreswith speed symbol Y (see 3.30.4).

14

IS 15633:2005

Table 13 Load/Speed Performance

(Clauses 4.2.1 andD-1 .2)

SI Speed Category Diagonal (Bias-Ply) Tyres Radial Tyres Bias-BeltedNo. ~ ~ ‘Yres‘ta”dard

Reinforced

(1) (2) (3) (4) (5) (6) (7) (8)

i) L, M, N 2.3 2.7 3.0 2.4 2.8ii) P, Q,~S

—2.6 3.0 3.3 2.6 3.0 2.6

iii) T, U, H 2.8 3.2 3.5 2.8 3.2 2.8iv) V 3.0 3.4 3.7 3.0 3.4 —

v) w — — — 3.2 3.6 —

vi) Y — — — 3,2 3.6 —

D-2.3 Throughout the test the tyre pressure must notbe corrected and the test load must be kept constant.

-D-2.4 During the test the temperature in the test-roommust be maintained at between 20°C and 40°C.or at ahigher temperature, if the manufacturer agrees.

-D-2.5 Carry the test through, without interruption inconformity with the following particulars:

a)

b)

c)

d)

e)

f)

Time taken to pass tlom zero speed to initialtest speed for 10 min.

Initial test speed prescribed maximumspeed for the type of tyre (see 3.28), less40 km/h in the case of the smooth wheelhaving 1.70 m~,l percent in diameter or less30 kmlh in the case of the smooth wheelhaving 2 m ● 1 percent in diameter.

Successive speed increments for 10 km/h.

Duration of test at each speed step except thelast for 10 min.

Duration of test at last speed step for 20 min.

Maximum test speed. prescribed maximumspeed for the type of tyre, less 10 km/h in thecase of the smooth wheel having 1.7 m * 1percent in diameter or equal to the prescribed

maximum speed in the case of the smoothwheel having 2 m + 1 percent in diameter.

However, for tyres suitable for maximumspeed of 300 km/h (speed symbol Y), theduration for the test is 20 min at the initialtest speed step and 10 min at the last speedstep.

D-2.6 However, -in case of a second testis performedto assess the top performances of a tyre type suitablefor speed above 300 kmih, the procedure shall befollowing.

However, in case of a second test is performed to assessthe top performances of a tyre type suitable for speedabove 300 km/h, the procedure shall be following.

D-2.6.1 Apply to the test axle a load equal to 80 percentof the maximum load -rating associated with themaximum speed specified by the tyre manufacture.

D-2.6.2 Test shall be run without interruptions inaccordance with the following

a) 10 min to build up from zero to the maximumspeed specified by the tyre manufacturer.

b) 5 min at the maximum test speed.

ANNEX E

(Clause 4.3.1)

PROCEDURE FOR ENDURANCE TEST

E-1 APPARATUS E-1.l Preparation of Tyre for the Test

The test wheel shall be a flat-smooth-faced wheel Condition the inflated tyre/rirn-wheel assembly in anhaving diameter of 1.7 m + 1percent. The surface width ambient atmosphere 20”C to 40°C or higher, ifof the wheel shall be more than the loaded tyre tread acceptable to the tyre manufacturer for a minimumwidth. The air surrounding the tyre during the test shall period of 3 h. Readjust if necessary, the tyre pressurebe at a temperature of 20”C to 40”C, or at a higher to the original inflation pressure immediately beforetemperature if acceptable to the tyre manufacturer. the test.

15

IS 15633:2005

E-1.2 Test Procedure face of thetest drum attheinitial (stage I)test load,

Mount the conditioned tyre/rim-wheel assembly on a followed by the test .Ioads stage 2 and 3, as those

test machine axle and press the tyre tread against the specified in Table 14.

Table 14 Endurance Test Parameters (T_est_IMlation Pressure 180 I@a)

(Clauses 4.3.1 and E-1.2)

sl Test Load Maximum Load Capability x Percentage ofNo. kg Maximum Load

(1) (2) (3)

Test speed, krdh 81.c

Test -stage Test period~ -Percentage of maximum rated load

O 1 4 85

ii) 2 6 90

iii) 3 24 1-00

ANNEX F

(Clauses 4.4.1 and 4.4.2)

PROCEDURE FOR BEAD UNSEATING RESISTANCE TEST

F-1 PREPA-RATION OF TYRE

Wash the tubeless test tyre for passenger car at thebeads, and mount it, as a rule, on a recommendedpainted rim as specified in applicable specificationswithout the use of lubricant or adhesive. Inflate thetyre to inflation pressure of 180 kPa. Allow it to standat the room temperature for at least 3 h and then readjustits pressure to the original inflation pressure.

-F-l. 1 Test Device

The test device is a standard block as shown in Fig. 2(for reference) shall be used and is.forced against tyreside wall.

F-1.2 Test Procedure

With the tyre and wheel mounted in the suitable fixture,the load shall be applied through the standard block tothe centre of sidewall at a rate of 30 + 1.5 mm/minwith the load arm substantially parallel to the tyre andrim assembly at the time of engagement. Increase theload until the bead unseats or until the applicableloads specified in Tables 15 and 16 are met. Themeasurement of load shall be made at least four

points approximately equally spaced around thecircumference of the tire, and the load for eachmeasurement shall be recorded.

Table 15 Minimum-Bead Unseating ResistanceValue (Tubeless Tyres)

(Uzuses 4.4.2 and F-1.2)

S1 NominalSeetion NominalSection NominalsectionNo. Width Under 160 Width 160 to 205 Width 205 or

Exclusive More(1) (2) (3J (4)

i] 6670 N 8890 N 11120N(680-kgf) (905 kgf) (1 135 kgfi

Table 16 For Tyres Load Index is not Marked

(Clauses 4.4.3 and F-1.2)

S1 Load Capability Load Capability Load capahh~No. Index 75 or Index 76 to 92 Index 93 or

Less More

(1) (2) (3) (4)

i) 6670 N 8890 N 11 120N(680 kgf) (905 kgt) (1 135 kgf)

16

IS 15633:2005

TANGENTSECTION A -A B~

MATERIAL:

39 (rep)

$

10°

1-

10°

\7

41 146

-160. R 25

SECTION B - B

CAST ALUMINUM 355T-6 CONDITIONFINISH -50 MICRO INCH

FIG. 2 DIAGRAM OF BEAD UNSEATING BLOCK DIMENSIONS IN INCHES

17

IS 15633:2005

ANNEX G

(Clause 4.6.1)

PROCEDURE FOR TYRE STRENGTH TEST (PLUNGER TEST)

G-1 APPARATUS

The equipment consists of a cylindrical steel plunger,having a hemispherical end of a diameter specified inTable 17 and Table 18 and a device to force the plungerrod into a tyre at the rate 50 + 1.5 mm/min.

G-1. 1 Preparation of Tyre for the Test

The tyre with a tube shall be mounted and inflated ona test rim of the recommended size and shall beconditioned at approximately the temperature of theroom in which the test is to be conducted for at least3 h after which the pressure shall be adjusted, ifnecessary, to the test inflation pressure specified inTable 17 and Table 18.

G-1.2 Test Procedure

The plunger rod shall be forced into the tread of thetyre/wheel assembly mounted as specified in G-1.l.Perpendicularly over a tread elementat the centerlineof the tread, or as near as possible to avoidingpenetration into a tread groove. The rate of travel ofthe plunger; shall be 50 + 1.5 mm/min until the tyre

breaks or the plunger is stopped by the rim(bottomingof the plunger against the rim), in which case the tyreshatl be deemed to have passed the test regardless ofenergy value. Measurement of force and penetrationat break (or bottoming against the rim) shall be madeat 5 points nearly equally spaced around the tyrecircumference. The arithmetic mean energy absorbedshall be calculated from the five ener~ vrdues obtainedat the break, using the formula given in G-1.3.

G-1.3 Formula for Calculating the Breaking Energy

where

W = energy at break (or bottoming), in J (Joule);

F = force at break (or bottoming), in N; and

.P = penetration at break (or bottoming), in mm.

G-1.4 As an option, for purpose of conformity, if theplunger energy measurements meet or exceed theminimum value specified, it is not necessary tocontinue penetration of the plunger to break the tyre.

Table 17 Static Breaking Energy-for Passenger Car Tyres (Diagonal Ply)

(Clauses 4.6.1 and G-1)

SI Tyre Size Ply Rating Plunger Diameter Inflation Pressure Minimum Breaking EnergyNo. mm kPa / A

RayonY

NylonJ (kg-cm) J (kg-cm)

(1) (2) (3) (4) (5) (6) (7)

i) Up to 6.00 (Nominal section) 4 19* 0.2 165 113.(1 152) 181 (1 845)6 19+0,2 195 169 (1 723) 271 (2 763)

ii) Above 6.00 (Nominal section) 4 19* 0.2 195 186 (1 896) 294 (2 998)Including F78-15 6 19*0.2 195 280 (2 852) 441 (4 497)

8 19● 0,2 220 373 (3 802) 588 (5 996)

NOTES

1 Recommended rim sizes shall be used for the breaking energy test.2 ForF78-I54PR bretiing energy tesL inflation pressure will be 170 kPa.

Table 18 Static Breaking Energy for Passenger Car Tyres.(Radial Ply)

(Clauses 4.6.1 and G-1)

S1No. Tyre Size Nominal -Plunger Diameter Inflation Pressure Minimum Breaking EnergySection Width mm kpa J (kg-cm)

(1) (2) (3) @) (5)

i) Under 160 19* 1.6 180*5 220 (2 245)ii) 160 or more 19+ 1.6 180+5 295 (3 010)

18

IS 15633:2005

Table 19 “Type Test Schedule

[Clause 6.1)

S1No. Tests Tyre 1 Tyre 2 Tyre 3 Tyre 4

(1) (2) (3) (4) (5) (6)

O Tyre marking 4 — — .

ii) Tyre dimensions 4 — — —

iii) Tread wear indicator 4 — — .-iv) Tyre strength test 4 — ..

v) Endurance test — : .

vi) Load/Speed performance test — — 7vii) Bead unseating resistance test for tubeless tyre — — — 7

Table 20 Conformity of Production Test

(Clause 7.3)

S1No. Tests Tyre 1 Tyre 2 Tyre 3 Tyre 4

(1) (2) (3) (4) (5) (6)

O Tyre marking 4 — — —

ii) Tyre dimensions — — —

iii) Tread wear indicator : — — —

iv) Tyre strength test + — —

v) Endurance test — 7 —

vi) Load/Speed performance test — — 7vii) Bead unseating resistance test for tubeless tyre — — — T

Numeric

Metric

ANNEX H

(Clause 5.2)

TYRE SIZE DESIGNATI(3N

4.50 -12 4PR

~

215 -S R 15

~

Alpha Numeric (Bias)

Alpha Numeric (Radial) B R ’78 14

m

19

Ply ratingNominal rim diameter codeNominal section width code

Nominal rim diameter codeRadialSpeed category symbolNominal section width code

Nominal rim diameter codeNominal aspect ratioLoad

Nominal rim diameter codeNominal aspect ratioRadialLoad

IS 15633:2005

ANNEX J

(Clause 5.4)

ARRANGEMENT OF TYRE MARKINGS

J-1 THESE MARKINGS DEFINE A PNEUMATICTYRE

a)

b)

c)

d)

e)

f)

g)h)

j)

1Ib 185/70 R14

t 1I c MAR 02

t

b = 6 mm, Min.

c = 4 mm, Min.

Nominal section width of 185;

Nominal aspect ratio of 70;

Radial-ply structure R,

Nominal rim diameter of 14;

Load capacity of 580 kg, corresponding toIoad index 89 in Annex B to this regulation;

Speed category T (maximum speed 190 kdh);

Fitting without an inner tube (tubeless);

Manufactured during the month March of theyear 2004; and

Maximum pressure of220 kpa or 2.25 kg/cm2.

J-2 The positioning and order of the markingsconstituting the tyre designation shall be the following:

1.

2.

3.

4.

5.

6.

7.

8.

1 189T ‘~ TUBELESS ~

t

k

t

220 kPa (2.25 kglcm’) C12

t

a)

b)

c)

Size designation, comprising the nominalsection width, the nominal aspect ratio, thetype-of-structure symbol (where applicable)and the nominal rim diameter shall begrouped as shown in the above example:185/70 R14;

Load index and the speed category symbolshall be placed together near the sizedesignation. They may either precede orfollow it or be placed above or belowl; and

Symbol Tubeless, Reinforced, and M+S maybeat a distance from-the size designation.NOTE — Arrangement of markings relates only to thetyre designation. Other markings location wit] be leftto the discretion of the tyre manufacturer,

ANNEX K

(Clause 6.2.2)

INFORMATION TO BE SUBMITTED FOR TYPE APPROVAL OF TYRES

Manufacturer’s name and address

Telephone No.

FAX. No.

E-mail address

Contact person

Tyre-size designation

Trade-name or mark

Category of use (nmnal/special/snow)

9. Strwture: diagonal (bias-ply/bias-belted/radial)

10. Speed category

11. Load index of the tyre/maximum load carryingcapacity (kg)

12. Whether the tyre is to be used with or withoutan inner tube

13. Whether the tyre is normal or reinforced

20

IS 15633:2005

14. Ply-rating number of tyres for (for codedesignated tyres)

15. Overalls ectionw.idth( mm)16. Overall diameter (mm)17. Rim on which tyre can be mounted

18. Measuring rim and test rim

19. Inflation pressure (bar)

a) Inflation pressure corresponding tomaximum load carrying capacity

b) Test and measurement pressures

20. Factor X referred to in 3.31 incase oftheoretical (imaginary) rim, if applicable

21. Maximum speed permitted by the tyremanufacturer and the load carrying capacity

allowed for that maximum speed. Applicableonly for tyres identified by means of lettercode “V” within fhe size designation andsuitable for speeds over 240-km/h or for tyresidentified by means of letter code Y?’ withinthe size designation and suitable for speedsover 270 kmlh

22. Intended for use on (type of vehicle)

23. Numbers and height of tread wear indicator

24. Type of tread pattern (Lug or rib)

25. Drawing or photograph in triplicate identi~ingtyre tread pattern, side wall marking andrelevant dimensions of inflated tyre mountedon the measuring rim.

ANNEX L

(Fiwewmi)

COMMITTEE COMPOSITION

Automotive Tyres, Tubes and Rims Sectional Committee, TED 7

Organization

Central Institute of Road Transport, Pune

All India Motor Transport Congress, New Delhi

Automotive Tyre “Manufacturers Association (ATMA), New Delhi

Ashok Leyland Ltd, Chennai

Association of State Road Transport Undertaking, New Delhi

Automotive Research Association of India, Pune

Bajaj Auto Ltd, Pune

Bajaj Tempo Ltd, Pune

Indian Tyre Technical Advisory Committee, New Delhi

Controllerate of Quality Assurance (Vehicles), Ahmednagar

Defence Research and Development Estt (DRDO), Ahmednagar

>-Department of Industry Policy and Promotion, New Delhi

Directorate General of Supplies and Disposals, New Delhi

Escorts Tractors Ltd (Research and Development Centre),Faridabad

Representative(s)

SHRIA. S. LAKRA(Chairman)SHRJP. S. MONOLI(Alternate)

SW CHJITARANIANDAS

SHRJN. GANESHSHJUD. RAVINDRAN(Alternate)

SHRJR. C. BALAKRJSHANANSHRJC. SUNDARSANAN(Alternate)

SHRJP. S. SHRJMALISmu S. K. PATRA(Alternate)

SHRIN. V. KARANTHSHRJA. R. ARANKALLE(Alternate)

Strro C. Y. DESHPANDESmu T.. M. BALARAMAN(Alternate)

Ssuu V. V. DESHPANDESHRJS. M. PARANJAPE(Alternate)

SHRJT. R. GOPALkKRISHNANSHRJT. FALCAO(Alternate)

SHRJA. R. KOLKARNIMAJORDEEPAKSHARMA(Mterrrate)

SHRJR. C. SETHISmu N. KARUPPAIAH(Alternate)

SHRJSusmr. KUMARSHRJV. K. JAIN(Alternate) i

SHRIR. C. SHARiWIA

Smu A. V. ALEXANDERSHRJVIVEKGOPTA(Alternate)

21

IS 15633:2005

Organization

Fiat India Pvt Ltd, Mumbai

HMT Ltd, Pinjore

Hyundai Motor India Ltd, Chennai

Maruti Udyog Ltd, Gurgaon

Mahindra and Mahindra Ltd, Nasik

Ministry of Defence, Jabalpur

Ministry of Surface Transport (Transport Wing), New Delhi

Ordnance Factory Board, Kolkata

Schrader Duncon Limited, Mumbai

Society of Indian Automobile Manufactures, New Delhi

Tat? hlotors Ltd. Pune

Toyota Kirloskar Motor India Ltd, Bangalore

Tractor Manufacturer’s Association, New Delhi

Triton Valves Ltd, Mysore

Wheels India Ltd, Chenrmi

Yamaha Motor India Pvt Ltd, Faridabad

BIS Directorate General

Representative(s)

SHRIV. MURUGAN

SHRJALO~NIGAMSsnuP. K. AGGARWAL(Alterrrute)

SHRIA. P. GANDHI

SHRtDEEPAKKUMARSmuD.N. IIAvE(Alternate)

SHRJKAILASHJAT

SHRJT. K. BASUSHRJY. SOMRA(Alternate)

DIRECTOR(TECHNICAL)

SHRIANURSINGHMu Y. SOMRA(Alternate)

%-NOp. p. pRABHUSHRJP. .J. SmrrY (Alternate)

SHRSRAJATNANDI

SHRJS. P. MOOKERJEESrrar P. K. BANSRJES(Alternate)

SHIUSACHIOYANAZABI

SHRJT. C. GOPALAti

SHRJN. L. K. MALHOTRA(Alternate)

SHRJS. ?VIALLIKAKJW4AIAH

Smu S. RAMESH(Alternate)

SHRJV. CHAKRARAJAN

SHRIS. MUTHUKIUSHNAN(Ahernafe)

SHRIK. C. JAINSSDUR. K. G(JPTA(Alternate)

SHRJP. C. JOSHJ,Dkector and “Head (TED)[Representing Director General (EEoflcio Member)]

Member SecretaySW R. R. SINGH

Deputy Director (TED), BIS

22

(Continued>om second cover)

In this standard S1units have been used, the unit of force, in Newton(N), of tyre load, in kilogram (kg) and ofpressure, in Pascal ( Pa ). Their relationships are given below for information:

1 kgf = 9.80665 N

1 kgflcmz = 98.066 kPa

The composition of the Committee responsible for formulation of this standard is given in Annex L.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance withIS 2:1960 ‘Rules for rounding oft%umerical values (revised,)’. The number of significant places in the roundedoff value should be the same as that of the specified value in this standard.

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goods andattending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the fkee use, in the course of implementingthe standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating tocopyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from DOG:No. TED 7 (404).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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