Here are some tips on adjusting your bike to suit your body:
Frame Size
- There should be at least an inch between your crotch and the top tube when you're straddling the bike. (Of course, a "girl's bike" has no top tube.)
- The frame size is the length from the seat to the bottom bracket (where the pedals connect to the frame).
- Calculate the correct height measurement for your frame by multiplying the length of your inseam (crotch to floor) by 67, then dividing by 100. Subtract about ten centimetres (four inches) for a mountain bike.
Seat Position
- A common error is to keep the seat too low, which can be very tiring. When you're riding, the leg on the lowest pedal should be fully extended, but not locked. You should be able to keep your foot almost parallel to the ground; you shouldn't have to stretch to reach the pedal.
- The seat should be at the same level as – even a little higher than – the handlebars, depending on the bike and your body.
- The seat can usually be moved back and forth on rails. When your elbow touches the front of the seat, your fingers should be within a centimetre (about half an inch) of the handlebars.
- Also, read what feature writer Jon Sparks says about saddle height here.
Handlebar Position
Women and, less frequently, men are prone to straining their backs if they have to stretch too much to reach the handlebars. Some solutions to this problem:
- Modify the handlebar position
- Attach brake levers that curve in closer
- Consider riding a more upright style of bicycle
Also, your hands on the grips should naturally fall about shoulder width. (Feature writer Jon Sparks has more to say about handlebar position here.)
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