Size Calculator

This is a simple road bike sizing program devised from Greg Lemond's book. Also included is his early mentor and later rival Benard Hinault's crank length calculation.

Inseam is measured in socks with your feet slightly apart.

For the trunk measurement, while seated on a stool, measure from the seat to the top of the collarbone.

For the full arm measurement, while standing with your back against a wall and your arm extended horizontally in front of you, take the measurement from the wall to a dowel held in your fist.

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Inseam (in centimeters):
Trunk (in centimeters):
Full Arm (in centimeters):