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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

Bcd?

   
Old 09-30-07 | 12:49 PM
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Southernwayfare
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Bcd?
What is the BCD measurement given for cranks and chainrings? Something about the bold diameter?
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Old 09-30-07 | 12:55 PM
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Bikes: Full Fendered Bareknuckle, Faggin with 10spd Centaur, 1973 Raleigh 3spd Cruiser.

Bolt Circle Diameter. It's the diameter of the circle the bolts would make, taken from the center of the bolts.

https://www.sheldonbrown.com/gloss_bo-z.html
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