Bike Sizing and BG FIT

Santa Fe Trails Bicycle ShopLeavenworth, KS

Select the Right Bike• Road

– Recreational• Century/Charity Rides• Local/occasional

– Racing • Triathlon/Time Trials

– Olympic Distance– Ironman

• Criterium/Road Racing– Commuting

• Trail• Commuting

Consider Your Goals

• Completing a triathlon?– Placing as an Age Grouper?– Achieving a PR?

• Commuting to work?• Riding on Trails?

Riding Possibilities of Your Area

• Low traffic country roads.• Longest rails to trails in the U.S.• Multiple Triathlons• Multiple Century Rides• Multiple Criteriums/Time Trials/Road Races• Multiple Mountain Bike Trails

Analyze Your Tendencies

• Win at all costs?• Fun oriented? • Latest technology?• What type of riding do your friends do?

Road Bikes

• Light weight• Efficient• Geared for speed.• Aerodynamic• Best for group rides

– Century– Criterium– Club

• Optimum for entry level triathlons

Mountain Bikes

• Comfortable Upright Position• Fat, Shock absorbent tires• Suspension forks and frames • Plenty of load carrying capacity• Ideal for single-track, commuting, rails to

trails.• Inexpensive

Hybrids

• Commuting – Faster than a mountain bike– More durable than a road bike

• Trail bike – Works well on improved trails– Myriad attachments possible

Time Trial Bike

• Aerodynamic Frame – Usually Carbon Fiber• Maximum Speed and Pedaling Efficiency• Steep Seat Tube Angle 76 Degrees versus a

road 73 Degrees• Top Tube Length is Shorter 539 versus 565

Time Trial

• Steep seat tube angle– Aero position with flatter back– Rotates you forward, allowing hip and knee angles

to remain open.– Less stressful on back and hamstring muscles– Knees should not protrude in or out.– Line from ear to elbow should be perpendicular to

the ground.

Best Approach

• Go to your local bike shop (SURPRISE!)• Try bikes that you are considering

– More than a sum of their parts– Frames, components, geometry varies

• Get fit by an expert• Get refit as the season progresses

Frame Size

• Stand over is the distance from the ground to the top of the top tube.

• Frame size measured in Centimeters– Center of BB to top of seat tube– Size = Inseam in Cm X .67

Saddle Height

• Saddle Height – measured from center of bb to top of saddle– Heel on the pedal, leg is locked.

• Formula = Inseam in Cm X .883– Formula gets you to within 1 – 2 Cm– Variables

• Leg length• Flexibility

Saddle Position

• Generally thought that knee should be over the pedal when cranks are level.

• Best set up by a professional• Saddle should be level for women• Saddle should be level to 2 degree rise for

men.

Top Tube and Stem

• Torso length + Arm Length divided by 2 +4 = Top Tube and Stem Length

• Individual Comfort is Key• Flexibility as the season progresses• Frames come with stock stem length.• We provide free stem replacement ($45

value)

Saddle Sizes

• Narrow• Medium• Wide

Pedals

• Different Types– Speedplay – Zero/Light Action/X Series– Shimano SPDR/SPD/Compatible – Look

• Float/No float• Foot Burn.• Large Feet• Wide Stance – We now have 5 Options

Shoes

• Rigid – Specialized Shoes Stiffness Index• Comfort• Footbeds Red/Blue/Green• Fore Foot Wedge• LLD – Cleat placement/cleat shims

Handlebar Width

• Cm from Shoulder Blade to Shoulder Blade• Usually 42, 44 or 46• Can be measured from side to side or center

to center by manufacturer

References

New Cyclists Handbook, by Ben Hewitt, Rodale Inc. 2005Triathlon 101,Essentials for Multisport Success, by John Mora, Human Kinetics. 2009Training Plans For Cyclists, by Gale Bernhardt, Velo Press, 2009Specialized Road 2013 CatalogGreg Lemond’s Complete Book of Bicycling, Perigree Books, 1987

Pedal Stroke Mechanics

Main Points

1. Get the right fit (foot, leg, hip, body alignment)

2. Learn to use your gears

3. Stay seated as much as practical on hills

4. Develop a good cadence

• NOTE—From this point on, open in “Notes Page” to read the Key Points of each slide.

Foot/Cleat Position

Pedal Stroke Made Easy

Drills

• Spinning classes• High cadence spin up drill• Isolated leg training• Learn to use your gears

Optimal Cadence

• High cadence – Works cardiovascular system more– Reduces workload for each pedal stroke

• Low cadence– Lower oxygen consumption– Greater workload for each pedal stroke

• Optimal balance is different for everyone, experiment to see what works best for you

How to Attack Hills?Rolling hills•Use momentum to carry you up start of hill•Short hills, power hard through lower portion•Shift through rear sprocket cluster as cadence drops•Hopefully stay in big chain ring up front•Near the end, get out of saddle and power over the top

Long steady climbs•Don’t power too hard at lower end – this could cause you to go anaerobic•Find comfortable cadence and settle in – maybe around 70 to 75 rpms•Use your gears!•Relax hands and upper body – no head/shoulder bobbing•Shift around on saddle – scoot back slightly•Stand only to regain momentum – not an efficient way to climb•Near top explode out of saddle and power over the crest

Hills (power)Flats (speed)

Cycle Computer

Basic

Advanced

Strength Trainingto Improve Your Biking Muscles

• Walking lunge and/or step up• Calf Raise• Leg extensions• Leg curls• Squats and/or leg press

Bike TrainerResistance trainers: wind, magnetic, or fluid $100 - $400

Computer-based trainers$700 - $2000

Rollers $100 - $300