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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 05-25-08, 02:20 AM   #1
i86o
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Kilo TT bottom bracket sizing

anyone?
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Old 05-25-08, 02:30 AM   #2
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English, 68mm.
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Old 05-25-08, 02:52 AM   #3
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well then i suppose i am unfamiliar with the variables of sizing, this is the only size information i need to find an appropriate bottom bracket? do i need a certain spindle length, or casing length for it to fit properly?

ive never changed a bottom bracket,
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Old 05-25-08, 02:55 AM   #4
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well then i suppose i am unfamiliar with the variables of sizing, this is the only size information i need to find an appropriate bottom bracket? do i need a certain spindle length, or casing length for it to fit properly?

ive never changed a bottom bracket,
The spindle length is dependent on the crank. What crank do you have?
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Old 05-25-08, 03:10 AM   #5
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im still deciding, how do i calculate?
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Old 05-25-08, 03:18 AM   #6
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im still deciding, how do i calculate?
You read the website of the maker of your crank and find out what size and taper (JIS or ISO) spindle it needs.

For instance, I use IRO cranks which take a 110mm JIS spindle.
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Old 05-25-08, 10:51 AM   #7
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there should be a link to some of the more complete sizing data lists in the pictures thread.
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Old 05-25-08, 02:12 PM   #8
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The bikes direct website lists the BB as 68x103, but I've had mine out and it's a 68x108 with the stock truativ cranks.

If you're running something else you'll need a BB size specific to the cranks you have.

Last edited by sake bomb; 05-25-08 at 02:15 PM.
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Old 05-25-08, 02:16 PM   #9
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it's normal standard track bike specs--- 42mm chainline with a properly dished 120 spaced track hub--- so most cranks made for ss/fg will tell you the right bb to use.
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