Biopace Chainwheels - discu.eu

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TIL some chain wheels are not perfectly circular like biopace from shimano . My chain wheel is one of them, to be honest what do you guys like? http://www.sheldonbrown.com/biopace.html 6 comments 10/8/2015 bicycling

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Sheldon Brown, Web's Cycling Guru, Dies | WIRED http://blog.wired.com/underwire/2008/02/sheldon-brown-w.html 17 comments

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