No. The graph shows both pedals. Marked L and R.
When the crank arms are vertical, there is, at most, only slight rotational pressure being applied to the pedals. Not enough pressure to flex a frame.
Also, very little of the flex is stored in the drivetrain, ready to be put in to rotational force. This whole discussion is based around the frame flexing, the BB area moving left/right in relation to the rest of the frame. That force truly does go to zero as your legs alternate pressure.
Quote:
Originally Posted by Kontact
The graph is for one pedal, and shows that the one pedal is actually pushing against the crank rotation at times. If the other pedal truly went to zero at any point where the first pedal was anti-rotation, the pedals would stop momentarily, the chain would get slack and there would be a clank as the pedals started to re-engage the freewheel pawls.
The reality is that, despite the highs and lows, we provide varying but continuous power to the rear wheel. The tension in the chain, on the spider and through your legs never goes to zero.
If you were to take that pedaling vector diagram and sum it with the other pedal you would find no spots where there isn't net pro-rotation force.
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