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While I was doing the old Zwift last night, I had the benefit of a beautifully freshly-lubed chain (thank you Putoline). However, the absolute silence of the chain and gears meant that every other noise and vibration was obvious, and there was a distinctive once-per-revolution graunch through the right pedal. No noise or creaking, but a definite feel through the pedal
I tried flipping the chain off the chainset and spinning it round by hand and couldn't feel anything (but then it's not really under any load), but giving it a reasonably hard spin and leaving it only resulted in about five or six revolutions before it stopped.
My suspicion is the BB (it's a good six years old), sound reasonable? Does an Ultegra BB need any special tool other than a standard HT2 one?
*cough*
I think depends on the age. Older ones use the normal tool where newer ones use the different insert like XT (this might come with the BB though).
I'd probably check the pedals before doing the BB but 6 years is a good while and will need doing at some point anyway.
Standard hollowtech tool as far as I know.
Cheers all. A root through the original receipt for the bike has it as a BBR60, which look like they use the standard HTII tool (and they're only £19.99)
Some shimano BBs come with a plastic adapter to let you use a standard tool on the smaller splines.
If it still spins OK it might be worth removing the bb and cleaning everything, putting it back in and making sure its tight.
Sometimes it's a bit of grit or id's got lose.
But if it's 6 years old then it's probably worth replacing anyway.
Hi
Have you checked to see if your crankset is debonding ?
my bike with ultegra 6800 crankset started to make a clicking noise
And i've just found the outer layer on the chainring side has started to peel away from rest of the crankset
looked on web and it seems fairly common
https://www.bikeradar.com/features/shimano-crank-failure/