# Measuring Torque in a bicycle [closed]

1. How to measure torque in a bicycle?
2. how much newtons will produce by the pedal of the cycle ?
• Are you wanting the torque in some part of the frame? The main upright? Jul 25 '19 at 7:08
• Do you know the newtons provided by the cyclist? A "normal" rider or Chris Boardman? Jul 25 '19 at 7:11
• How to measure experimentally? Or how to calculate? Peak torque or average? You need to give much more information. You might start with why you are looking for this information? Jul 25 '19 at 7:16
• A starting guess might be the weight of the rider times the crank length. Jul 25 '19 at 14:08

Most bicycle cranks are 170mm and they vary from 165mm to 180mm.

Skilled bicyclist can apply up to 1.5 to 2 times their weight on the pedals in burst of power to pass a race competitor by leveraging the handles and using the entire frame of the bike as a lever.

Say a rider weighs 160lbs.

$$T = 160*1.5*0.56=136lbs.ft$$

As an aside, a fit bicyclist can produce continuous 160-180 watts energy.