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Clacking noise post-tire change
#1
I took my bike to a shop to get a replacement rear tire. (Old well maintained Centurion LeMans 12-speed) The shop took the tire off, swapped the tire and tube, and put everything back. I know that they lubricated the chain because it was greasy when I checked it. But when I pedaled home, it made a clacking noise. Seemed to be related to pedaling, not so much when I was coasting, more clacking at higher speed. I couldn't put it in the lowest gear. When I got home, I removed the saddle bags and slipped the quick release wheel out of the forks (just an inch or so) then replaced it. Seemed to be able to jostle the low gear back to where I could down shift all the way. But I still have the clacking. Today I also noticed that the chain started jumping the gears.

No change other than bike tire/tube and some lubrication. Suggestions what to check first?

(Yes, I did take it back to the shop and he suggested that it was the ball bearings in the rear, that this was causing the noise and jumping off the gears. Then he suggested that on my 12-speed I should never ride in a low gear, only the high gear, to make sure the chain was tight. Wow. Really.)

Suggestions, post-tire change?
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#2
1st find another shop.

is the noise related to crank (pedal) rotation, wheel rotation or something else?

If you are close to any of us, we may be able to help in person.
Nigel
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#3
(11-20-2013, 04:20 AM)nfmisso Wrote:  is the noise related to crank (pedal) rotation, wheel rotation or something else?

Basically: How often do you turn the crank per "clacking". This will indicate (roughly) where it happens. Try pedalling standing / seated, does the noise change? Swap pedals with another bike...
Until you figure this out it could be basically anything (it could be the shoe hitting the frame or the saddle, or...). Good luck figuring it out (mystery noises are a pain) but when approaching it systematically you have a chance. (For me it was the saddle that was creaking).
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#4
(11-20-2013, 11:29 AM)Joe_W Wrote:  
(11-20-2013, 04:20 AM)nfmisso Wrote:  is the noise related to crank (pedal) rotation, wheel rotation or something else?

Basically: How often do you turn the crank per "clacking". This will indicate (roughly) where it happens. Try pedalling standing / seated, does the noise change? Swap pedals with another bike...
Until you figure this out it could be basically anything (it could be the shoe hitting the frame or the saddle, or...). Good luck figuring it out (mystery noises are a pain) but when approaching it systematically you have a chance. (For me it was the saddle that was creaking).


On my way to work this a.m., I noticed that coasting didn't produce a noise, just pedaling. I still think it's related to the tire change. Maybe too much lubrication (chain jumping), maybe he adjusted something. He may have done something to do me a favor and tightened/loosened it too much. I will check the pedals & seat according to your recommendation. Thank you.
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