Thread started by godmode at 03.24.09 - 4:35 pm

I don't know what size my bottom bracket is :(

..I have an old school fuji frame. Do any of you guys know what size my bottom bracket might be? I have a sugino RT or RD crack.. one of those two..

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There are two sizes you need to consider:

1. The size/threading of the shell. I'm guessing it's a 68mm English/Standard threaded BB shell, as that's the most common for Asian made road bikes, but you'll want to double check.

2. The length of the spindle. If this is for a fixie, to get a straight chainline, you need to get the appropriate length BB spindle (103mm, 107mm, 110mm, etc.). This depends on what kind of crank you're using.

http://www.sheldonbrown.com/gloss_ch.html#chainline



JB
03.24.09 - 4:39 pm

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it's a fixie, but it used to be a geared bike, does that change anything??



godmode
03.24.09 - 4:42 pm

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do you think a 68x108mm BB would fit?



godmode
03.24.09 - 4:45 pm

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the 108 is the spindle length. the 68 is the cup size. if you have any questions about this stuff and cant figure it out yourself, take the frame to one of the local bike coops or even orange20 or another bike shop in your area and they will answer whatever questions you have.



ruinedbyidiots
03.24.09 - 4:49 pm

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yeah ima have to do that..



godmode
03.24.09 - 4:52 pm

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