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Old 05-13-08, 10:49 AM   #1
jmeier
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Cannondale bottom bracket noise

I have a Cannondale Synapse Sport with about 1000 miles on it and the bottom bracket has recently begun making a creaking noise. I took it into the shop and they said it was the derailer rubbing the chain and made an adjustment. now it creaks AND shifts poorly

I am taking it back in today, my question is: how long should the BB last? should it need repair/replacement after only 1000 miles of relatively flat riding?

Thanks
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Old 05-13-08, 11:20 AM   #2
neil0502
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That seems awfully quick for the BB to be shot under light load, flatland, normal riding conditions....

Two things:

1) Have them fix the adjustment that they, seemingly, did wrong, and

2) You/they should take another look at the likely source of the actual creak. Here's a couple of links to help with the pinpointing process:

http://sheldonbrown.com/creaks.html

AND

http://www.parktool.com/repair/readhowto.asp?id=123

It's usually just a matter of patiently removing, cleaning,
re-lubricating, and re-torquing fasteners until it quiets down.
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Old 05-13-08, 11:50 AM   #3
jmeier
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Thanks, I plan on having the derailer re-"fixed" at lunch and I'll talk to them about the BB
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Old 05-13-08, 03:34 PM   #4
jmeier
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aaahhhh, its quiet. the master wrench at REI took a look at the BB and began disassembling it right away. 45 min later its all back together, the derailer adjusted and I'm out the door for $0

He said if it became noisy this summer at all, he would take care of it
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Old 05-13-08, 04:43 PM   #5
neil0502
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Quote:
Originally Posted by jmeier View Post
aaahhhh, its quiet. the master wrench at REI took a look at the BB and began disassembling it right away. 45 min later its all back together, the derailer adjusted and I'm out the door for $0

He said if it became noisy this summer at all, he would take care of it
Sounds like ... he needed to grease/anti-seize/teflon tape the BB threads and re-torque them. Not at all uncommon.

Welcome back. You'll have to find another way to measure your cadence now
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Old 05-14-08, 11:24 AM   #6
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Yep, my old Cannondale has the same problem - wish I'd had a master mechanic, but instead I had me pulling the BB and replacing it three times to get it right. Lots of teflon tape and 3 years later = no creak.
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