Someone should make Biopace for current MTB cranks with NW teeth. I'd buy one. The oval ones seem really unscientific, like I'm not convinced the axis angle or eccentricity is based on anything at all except making it look "different but not too different"
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."