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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 05-27-07, 03:56 PM   #1
freeranger
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Btm.Bracket size?........

I know I can take it apart & it should be printed on the btm bracket, but thought I'd have one ready so I can slap it back together after taking it apart. 1998 GT Timberline--square taper btm.bracket-anyone know the size--I think it is a 68 x 113, but I'm not positive. Doesn't sound real great after todays ride-may or may not last thru this season.
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Old 05-27-07, 04:09 PM   #2
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May be oversized 73mm, but most likely 68mm...
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Old 05-27-07, 04:14 PM   #3
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When in doubt, you can measure:

a) width of bottom bracket shell - most likely, it will either be 68 or 73mm.

b) length of spindle (take off the crank arms). This is a little tricky since you probably won't have direct access to the spindle ends with a ruler. If you have a pair of calipers, then you're good to go. If you only have a ruler, you can have someone hold straight edges against the end of the spindle and you can measure the distance between the two straight edges.
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