|Ultegra BB life span?||rastro|
Sep 10, 2001 8:23 AM
|My bb has started creaking after 8,000 miles. The noise will stop for 100-200 miles if I pull, tape, lube and reinstall. Is this a reasonable amount of miles for this item?|
|re: Ultegra BB life span?||Lou D'Amelio|
Sep 10, 2001 9:04 AM
|unless you got a bad BB, something else is going on. An Ultegra BB will last almost indefinitely (I have about 25,000 miles on one on my now second bike). If the cranks spin smoothly when you have the chain off the chainrings, it's OK. What kind of frame is it ? Some have had success with BB creaks using Teflon plumbers tape. Sometimes it's something entirely different - I chased a BB creak for months which turned out to be from an incorrect lacing pattern on a rear wheel.
just my $0.02............Lou D'Amelio
|Good God! 25,000 miles? Is this a typo?! Congrats! nm||Chris Zeller|
Sep 10, 2001 2:57 PM
|Did you torque it?||Kerry Irons|
Sep 10, 2001 4:30 PM
|Creaking is usually a sign of an installation problem. If the BB axle is turning smoothly with minimal/no play, then the BB is not worn out. I believe the BB should be torqued to 30-40 nm. Assuming the BB is not rough/loose, clean threads, grease, and proper torque is the key to success in eliminating BB noises.|
Sep 10, 2001 7:14 PM
|The unit worked fine for well over a year(the 8,000 miles)and started creaking with "help" from me. I've been real careful about cleaning the threads, lube on every contact surface, plumbers tape and installed tight.
Although I do not use a torque wrench.
|Torque wrenching||Kerry Irons|
Sep 11, 2001 5:45 PM
|I worked on bikes for some 35 years without ever feeling the need for a torque wrench. When I got my current bike ('98), I got noises in the BB at about 1500 miles, so I took it apart, cleaned everything, and the noises went away. For about another 1000 miles. I got lots of advice about needing to use the torque wrench, so I got one and repeated the cleanup. I couldn't believe how much force was required to reach the BB torque spec. (70 n-m). I never would have tightened it that much "bare handed". Since using the torque wrench, I never have problems with noises, going about 10K miles between BB cleanups.|| |