1. How to measure torque in a bicycle?
  2. how much newtons will produce by the pedal of the cycle ?
  • $\begingroup$ Are you wanting the torque in some part of the frame? The main upright? $\endgroup$
    – Solar Mike
    Jul 25 '19 at 7:08
  • $\begingroup$ Do you know the newtons provided by the cyclist? A "normal" rider or Chris Boardman? $\endgroup$
    – Solar Mike
    Jul 25 '19 at 7:11
  • 1
    $\begingroup$ 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? $\endgroup$ Jul 25 '19 at 7:16
  • $\begingroup$ A starting guess might be the weight of the rider times the crank length. $\endgroup$
    – Eric S
    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.


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