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- CommentAuthorSTEENIEZ
- CommentTimeMar 1st 2009
And i have a million questions but here is the first. As far as bottom brackets, how do you know what size you need to buy or what not. Are they just pretty standard. Its like the one part of the bike i have no clue about. Any help would be greatly appreciated. -
- CommentAuthorryanw
- CommentTimeMar 1st 2009
There are a couple of important things with bottom brackets. First is thread size: English (68mm) or Italian (73mm). Second is the spindle length. Different cranksets require different spindle lengths to get the right chainline, so you need to see what length your crankset calls for. -
- CommentAuthorSTEENIEZ
- CommentTimeMar 6th 2009
ok how do you know which thread size it is -
- CommentAuthorGone
- CommentTimeMar 6th 2009
Posted By: STEENIEZok how do you know which thread size it is
Measure the overall width of your bottom bracket cage, if it's 70mm wide then it's Italian 36X24F threads, If it's 68mm wide it's 1.370X24TPI threads which is pretty standard these day's or if your frame is French made then it's M34.7X1 threads. -
- CommentAuthorsfbee
- CommentTimeMar 6th 2009
What type of frame are you building up? Generally you can find specifications with a swift googling
Is this a road conversion, or a track frame? -
- CommentAuthorJoshua A.C. Newman
- CommentTimeMar 7th 2009
Almost all frames in the US, Europe, and Japan have English/ISO bottom brackets. If you've got an Italian or French frame, particularly an old one, it might be otherwise. -
- CommentAuthorSTEENIEZ
- CommentTimeMar 8th 2009
Its a Centurion Super Le Mans Frame. I'm pretty sure its english threads now
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