Singlespeed & Fixed Gear - crank and bottom bracket compatibility question

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mdoyle13
04-22-08, 10:04 PM
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.

trons
04-22-08, 10:06 PM
the only problem you might run into is crank clearance with the chainstays...
mdoyle13
04-22-08, 10:13 PM
yeah i didn't even think about that. i should probably just get a new crankset....

huerro
04-22-08, 10:21 PM
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).