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Henry Chiansky

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I am working on a project regarding the friction drive on bicycles. I would like to design an assembly which has to be compact enough, and has to be able to produce torque that will move the bicycle from a stationary position, but as it turns out with my calculations torque required is really high, or I am calculating something wrong?

My values:

Weight – 100kg

Bike wheel size – 26”

Torque result – 647Nm

Could you please help me find the answers (right values), or guidance in this problem as I think I am not taking into account some variables (friction value, weight distribution, etc.) that will change my result?