Originally Posted by
TugaDude
I ran a Biopace on a fixed gear/SS bike and never had problems. It is hard to wrap your head around but the tension really doesn't change much if at all.
Actually, it makes a lot of sense. Although the shape of the chainring changes, the circumference remains the same, so the distance remains constant. Per Sheldon Brown "
There is a slight variation in tension resulting from the varying angle between the two straight runs of chain as the axis of the chainring rotates, but this has not generally been of a sufficient magnitude to cause any problem in practice for me."
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