Bicycle Mechanics - chainring hits frame

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durty
10-09-08, 05:33 PM
I just got a new BB for an old frame, screwed it in and put the cranks on. But when I screwed the bolts in to the square tapers to keep the cranks on and the chainring was stuck up against the frame. What's can I do about that?
-durty

Ex Pres
10-09-08, 05:36 PM
You need a bottom bracket with a longer spindle, probably 8mm or so longer. What BB did you buy and what crank do you have?
operator
10-09-08, 07:07 PM
I just got a new BB for an old frame, screwed it in and put the cranks on. But when I screwed the bolts in to the square tapers to keep the cranks on and the chainring was stuck up against the frame. What's can I do about that?
-durty

You can buy the proper length bb, which is very likely longer than what you currently have.

DannoXYZ
10-09-08, 07:27 PM
be aware that a lot of older cranksets use asymmetrical BB spindles with the longer end on the right. Make sure the new one you get matches the one you took off.