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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)

BB Measurement question.

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Old 10-25-08 | 08:06 PM
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Adam G.
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BB Measurement question.
What does the difference in bb mean in measurement such as a 103mm and a 107mm? I am thinking if you get 165 cranks you use the 103mm bb and if you use 170mm cranks use 107mm bb. Or does the bb measurement determine the chain line?
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Old 10-25-08 | 08:08 PM
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Originally Posted by Adam G.
What does the difference in bb mean in measurement such as a 103mm and a 107mm? I am thinking if you get 165 cranks you use the 103mm bb and if you use 170mm cranks use 107mm bb. Or does the bb measurement determine the chain line?
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Old 10-25-08 | 08:13 PM
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Thank you sir!
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Old 10-26-08 | 02:35 AM
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That is the width of the bb spindle which helps you achieve chainline perfection.
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