TIRE SAFETY

Tyre Safety

Most of us drive motor vehicles on daily basis but hardly pay attention to one of the most vital parts of the vehicles - the tyres

TIRE SAFETY

Tyre Safety

3

Unfortunately, very few of us change this bad habit until it is too late

TIRE SAFETY Tyre Safety

Tyres expire 5 years after the date of manufacture. A tyre's expiry date is stamped on one side of it

TIRE SAFETY

Expiry Date

Tyre Safety

5

• A tyre's expiry date is indicated by a 4-digit number stamped on it

• The number indicates the week and the year it was manufactured

• The expiration date is 4 years after

TIRE SAFETY Tyre Safety

This number indicates that this tyre was manufactured on the 7th week of 2007, which is the same as February 2007. That would place the expiry date on February 2011

07 0707 07

7th week of the year “February”

Year of manufacture 2007

TIRE SAFETY Tyre Safety

7

• Expired tyres are likely to burst when used, and this might result in very serious, or even fatal, accident

• It is advisable to check our tyres and make sure they have not expired

TIRE SAFETY Tyre Safety

8

Another important point that we miss many times is proper tyre inflation. Some vulcanizers will calibrate your tyres at 28 PSI and if you are going to travel they will, sometimes, bring your pressure down to 24-26 PSI because they will “heat up on the highway and the pressure will come back up”. DO NOT ALLOW THIS

Tyre Pressure

Tyre Safety

9

• On the side of the tyre, you will find the maximum allowable inflating pressure for that specific tyre

• Some tyres have a maximum pressure of 32 PSI, some are rated at 44PSI and some even at 50 PSI. Check your specific tyre to see what the maximum pressure is

• It is an acceptable practice to have your tyres a few pounds below maximum allowable pressure but not too much

TIRE SAFETY Tyre Safety

MAX PRESS ACCEPTABLE

32 PSI 28 PSI

44 PSI 35 PSI

50 PSI 44 PSI

Different tyres are designed for different pressures. You will find the maximum tyre inflation pressure as a small number next to the rim on the side of the tyre. Never exceed this pressure!

(44 psi) MAX PRESS

TIRE SAFETY Tyre Safety

11

Lower pressure increases tyre heat. Infrared photograph of tyres tested at high speed shows damaging heat increases as pressure drops

TIRE SAFETY Tyre Safety

12

• The load we carry in our vehicles put strains on the tyres

• Tyres have maximum load rating designed for them

• Exceeding the maximum load can cause failure and this may result in accident

TIRE SAFETY

Load Rating

Tyre Safety

13

Attached table shows the load index and maximum load carrying capacity per tyre in pounds and kilograms

TIRE SAFETY Tyre Safety

14

Load index 109 maximum load capacity 2271 lbs 1030 kg.

TIRE SAFETY Tyre Safety

15

The speed rating of a tyre is indicated by a letter next to the load index. Adjacent table shows the speed ratings in Km/h & Mph

TIRE SAFETY

Speed Rating

Tyre Safety

16

Many of us have bought tyres in the past and we are asked the sizes we just read them from the old tyres and give to the persons at the tyre shops. But, what do those numbers mean?

TIRE SAFETY

Tyre Size

Tyre Safety

17

P 265 / 60 R 18

Passenger car tire Tire width in Millimeters

Radial Tire

Aspect ratio Height to width of tire 60% of width in this

case 18 Inch Wheel

TIRE SAFETY Tyre Safety

18

Temperature Resistance

• A tyre's resistance to heat is indicated by a letter

• Temperature resistance are rated from highest to lowest resistance as A, B or C

Simbolo

Symbol Area

AHot area

Area Caliente

BNormal Area

Area Normal

CCold Area

Area Fria

TIRE SAFETY Tyre Safety

19

Traction

• Traction is a tyre’s ability to stop on wet pavement. A higher graded tyre should allow you to stop your vehicle on a wet road in a shorter distance than a tyre with lower grade

• Traction is graded from highest to lowest as ”AA”, “A”, “B” and “C”

TIRE SAFETY Tyre Safety

20

Treadwear

The treadwear number indicates the rate at which the tyre wears out. The higher the treadwear the longer it should take the tyre to wear out. Hence, a tyre graded at 400 should last twice as long as a tyre graded at 200

TIRE SAFETY Tyre Safety

21

Summary

TIRE SAFETY

Watch the following indicators in your tyres to ensure safety:

•Date of manufacture / expiry date

•Inflation pressure

•Load rating

•Size

•Speed rating

•Temperature resistance

•Traction

•Treadware

Tyre Safety

22

Thank You!

TIRE SAFETY Tyre Safety