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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)

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Old 04-22-08, 10:04 PM   #1
mdoyle13
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crank and bottom bracket compatibility question

I'm currently building up a new bike and I'm going to use a tange 68x103 bottom bracket. I was hoping I could use the cranks from my old conversion, which are Sugino AT road cranks, with this bottom bracket. Does anyone think that I will run into any problems?
I like the cranks and would like to avoid buying new ones if possible. The proper spacing to get a straight chainline is 103 on the bottom bracket though so i can't go any wider.
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Old 04-22-08, 10:06 PM   #2
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the only problem you might run into is crank clearance with the chainstays...
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Old 04-22-08, 10:13 PM   #3
mdoyle13
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yeah i didn't even think about that. i should probably just get a new crankset....
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Old 04-22-08, 10:21 PM   #4
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The bottom bracket and cranks together determine the chain line, not just the bottom bracket. You need to think of them as a set.

A 103mm bottom bracket will definitely not work with that crank set (according to Sheldon's bb database it takes a 115.5 and 2mm of spacers to give you a 42.5 mm chain line).
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