01-09-2011, 02:38 AM
Hi,
My carbon road bike has developed an odd, definite click-click (say 3-4 clicks per crank revolution) from the either the cassette (I think, or from that area at least, maybe rear derailleur) or BB under moderate to high load/acceleration.
Odd thing is - it happens only in one gear (smack in the middle of the cassette range - not the largest or smallest). Changing up or down one gear and the clicking disappears. Does not seem to be chain scraping on anything, as it's not that kinda noise - and under low load it disappears in the gear in question. Happens on small and large chain ring, and only in that gear. I do run in this gear quite a bit, hence the problem.
Strange.
The groupset is Campag Veloce. Gear changes are smooth, and there appear to be no other problems. Spokes look ok, wheel is true. Can anyone give me some tips where I should start looking?
Chain is in good nick, as are derailleur gearwheels. Drivetrain is clean, not in need of lube either.
Bike has been back to the LBS for adjustment, they could not find anything. The noise did disappear for a couple 30km rides, but now it's back and a little worse.
Can you provide any tips or suggestions on what this could be?
Cheers,
Sushi
My carbon road bike has developed an odd, definite click-click (say 3-4 clicks per crank revolution) from the either the cassette (I think, or from that area at least, maybe rear derailleur) or BB under moderate to high load/acceleration.
Odd thing is - it happens only in one gear (smack in the middle of the cassette range - not the largest or smallest). Changing up or down one gear and the clicking disappears. Does not seem to be chain scraping on anything, as it's not that kinda noise - and under low load it disappears in the gear in question. Happens on small and large chain ring, and only in that gear. I do run in this gear quite a bit, hence the problem.
Strange.
The groupset is Campag Veloce. Gear changes are smooth, and there appear to be no other problems. Spokes look ok, wheel is true. Can anyone give me some tips where I should start looking?
Chain is in good nick, as are derailleur gearwheels. Drivetrain is clean, not in need of lube either.
Bike has been back to the LBS for adjustment, they could not find anything. The noise did disappear for a couple 30km rides, but now it's back and a little worse.
Can you provide any tips or suggestions on what this could be?
Cheers,
Sushi