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Old 06-21-09, 03:45 PM
Join Date: Mar 2007
Location: Portland, OR
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Replacement BB support cup for UN73

I over-torqued the plastic (non-drive) support cup on my UN73 bottom bracket and cracked it. Is the BB compatible with support cups off of other Shimano BBs (or even square tapered BB from other companies)? UN54 support cups seems to be much easier to come by than ones specifically for the UN73.
idegen is offline