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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 05-10-10, 07:27 PM   #1
HookAsnooK
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Chainline Help

I am currently failing in my endeavor to go fixed.

I have a Schwinn World Sport from about 86ish. Currently I am trying to put an 1/8 crank on the old square taper bottom bracket. The rear hub is a flip flop hub. Currently the chainline does not line up at all.

Do I need a certain bottom bracket? Thanks for the help.
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Old 05-10-10, 07:38 PM   #2
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Originally Posted by HookAsnooK View Post
I am currently failing in my endeavor to go fixed.

I have a Schwinn World Sport from about 86ish. Currently I am trying to put an 1/8 crank on the old square taper bottom bracket. The rear hub is a flip flop hub. Currently the chainline does not line up at all.

Do I need a certain bottom bracket? Thanks for the help.
Yes you need the correct spindle length which will depend on your crankset, the information shouldn't be hard to find.
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Old 05-10-10, 07:46 PM   #3
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Thanks I've been looking into that.
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Old 05-10-10, 08:04 PM   #4
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I've come to the conclusion that I need a 68 mm x 107(-110) mm bottom bracket. How do I know what the TPI is?
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Old 05-10-10, 08:10 PM   #5
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I've come to the conclusion that I need a 68 mm x 107(-110) mm bottom bracket. How do I know what the TPI is?
What kind of frame do you have, its most likely english thread.

edit: dur its a world sport,than I am almost positive it is english threaded 1.370" X 24 tpi (I don't know why its underlining, but it wont stop)

Last edited by cnnrmccloskey; 05-10-10 at 08:13 PM.
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Old 05-10-10, 08:48 PM   #6
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Pick up a 107mm Shimano UN-54. You'll be all set.
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