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#1
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creaky crank/bb
Hi
Recently ive been experiancing a creaking/clicking noise as I cycle my mountain bike. Adjusting the Bottom Bracket bearings seemed to fix this for a few weeks then it would reappear. I decided to buy a sealed cartridge to replace the factory fitted bearings, this was OK for a while but I am now experiancing the same problems. The creaking noise seems to occur when I apply force to the pedals, so it happens twice a revolution. It usually occurs when going uphill but also happens after freewheeling down a gradient, when I start pedalling to to continue my speed as the momentum runs out. It only only occurs when pedaling. The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? Any Ideas would be appreciated as its a tad annoying and noisey! |
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#2
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creaky crank/bb
noodles wrote on Tuesday 07 February 2006 19:11:
Hi Recently ive been experiancing a creaking/clicking noise as I cycle my mountain bike. Adjusting the Bottom Bracket bearings seemed to fix this for a few weeks then it would reappear. I decided to buy a sealed cartridge to replace the factory fitted bearings, this was OK for a while but I am now experiancing the same problems. The creaking noise seems to occur when I apply force to the pedals, so it happens twice a revolution. It usually occurs when going uphill but also happens after freewheeling down a gradient, when I start pedalling to to continue my speed as the momentum runs out. It only only occurs when pedaling. The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? Any Ideas would be appreciated as its a tad annoying and noisey! I had something similar a few months ago - I'd replaced bottom bracket, re-greased and renewed wheel bearings and cranks were plenty tight. Eventually all noises were cured by replacing a worn chain and sprockets. -- Regards Alex The From address above is a spam-trap. The Reply-To address is valid |
#3
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creaky crank/bb
"noodles" wrote in message o.uk... Hi Recently ive been experiancing a creaking/clicking noise as I cycle my mountain bike. Adjusting the Bottom Bracket bearings seemed to fix this for a few weeks then it would reappear. I decided to buy a sealed cartridge to replace the factory fitted bearings, this was OK for a while but I am now experiancing the same problems. The creaking noise seems to occur when I apply force to the pedals, so it happens twice a revolution. It usually occurs when going uphill but also happens after freewheeling down a gradient, when I start pedalling to to continue my speed as the momentum runs out. It only only occurs when pedaling. The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? Any Ideas would be appreciated as its a tad annoying and noisey! try removing your bottom bracket. Apply copper slip or similar to the threads and then refit. |
#4
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creaky crank/bb
"noodles" wrote in message o.uk... Hi Recently ive been experiancing a creaking/clicking noise as I cycle my mountain bike. Adjusting the Bottom Bracket bearings seemed to fix this for a few weeks then it would reappear. I decided to buy a sealed cartridge to replace the factory fitted bearings, this was OK for a while but I am now experiancing the same problems. The creaking noise seems to occur when I apply force to the pedals, so it happens twice a revolution. It usually occurs when going uphill but also happens after freewheeling down a gradient, when I start pedalling to to continue my speed as the momentum runs out. It only only occurs when pedaling. The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? Any Ideas would be appreciated as its a tad annoying and noisey! Use a torque wrench on the crank bolts. Ken. |
#5
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creaky crank/bb
noodles wrote:
Any Ideas would be appreciated as its a tad annoying and noisey! Does it occur when standing as well as when seated? I only ask because I had a similar experience a year or two ago; it took me _ages_ to find, eliminating every possibility, until I tried greasing my saddle rails, and -- bingo! A creak from the saddle is in time with pedalling which lead me to think it was somethin in the pedal/crank/chainring/bb area. The sound was difficult to pinpoint as well, as it travelled down the seatpost and tube, especially on the aluminium frame I was riding at the time. |
#6
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creaky crank/bb
in message , noodles
') wrote: Recently ive been experiancing a creaking/clicking noise as I cycle my mountain bike. Adjusting the Bottom Bracket bearings seemed to fix this for a few weeks then it would reappear. I decided to buy a sealed cartridge to replace the factory fitted bearings, this was OK for a while but I am now experiancing the same problems. I once diagnosed a bottom bracket problem on a friends bike (symptoms were noise when pedalling, none when freewheeling), and replaced his bottom bracket for him with some difficulty. Problem persisted. Finally took the back wheel apart and found the bearings in a hell of a mess. Noises on a bike don't always come from where you think they do. The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? DO NOT keep tightening crank-bolts on tapered square cranks - it's easy to split the cranks that way. If the crank arms are loose, you can check that by pushing down on the pedals with both hands as hard as you can (best with the bike upside down), rotating the cranks through 180 degrees and doing it again. If they're loose, they'll click. Any Ideas would be appreciated as its a tad annoying and noisey! I would check for cracks in the frame, especially around the drive side chain stay, and for problems in the rear wheel bearing, particularly on the drive side. -- (Simon Brooke) http://www.jasmine.org.uk/~simon/ ;; better than your average performing pineapple |
#7
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creaky crank/bb
noodles wrote:
........ The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? It is possible for cranks to be tight enough to seem and feel OK except when pedalling, sometimes a clicking noise/sensation results if they were not fitted tightly enough. I agree with the advice not to repeatedly tighten but it's worth a second go if you think they might not have been correctly fitted in the first place. I'm not sure cranks "creak" though. Leave the bottom bracket until you've checked/eliminated everything else you can think of. Then be careful any further tightening of the BB doesn't cause binding which will wear out the bearings quickly (test axle by hand to feel for any increased friction) -- this can happen even to cartridge BBs when the shell isn't perfect. ~PB |
#8
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creaky crank/bb
Last time I had this problem, I started taking glucosamine. Noe my knees
are better lubricated... (: Steve |
#9
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creaky crank/bb
Bob Watkinson wrote:
"noodles" wrote in message o.uk... Hi snipped The only thing I can think it could be is the crank arms moving on the tapered squares, but this all seems pretty well tightened? Any Ideas would be appreciated as its a tad annoying and noisey! try removing your bottom bracket. Apply copper slip or similar to the threads and then refit. I agree with Bob - don't try using anything else. And get a proper crank tool if you don't already have one. Tom. |
#10
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creaky crank/bb
Shoes/cleats ?
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