before i take it to the LBS on thu and get them to do it. Prizes for the first correct answer as verified by them.
Riding over at Nant the other week, over the course of the week on high torque sections, ie climbs, an increasingly loud and unpleasant sort of crunching, hollow sound from the freehub area, or cassette and drivetrain.
any suggestions? Sounds to me like the internals of the freehub coming to bits, but as it's a virtually new hub I would be somewhat disappointed. It's a Chris King. Or is it the drivetrain adjustment causing incorrect location of chain on cassette (i don't think it is as I adjusted this and it made no difference). Or is it something else. Thoughts?
When I last heard such a noise from the back end under similar circumstances, I was please to discover it was merely my cassette that had come loose. I tightened it up and it went away.
But I imagine you've checked that, so god knows. Don't know anything about CK hubs.
well that was my initial thought, and when i checked the lockring wasn't that tight. tightening it didn't seem to help, though. 🙁
check the wear on your chain, try a different wheel if possible to isolate the problem
What QR are you using? Could creak if it's not tight enough and you're getting some movement (has happened to me on SS).
well it's all brand new, or as good as, which is why i'm a bit perturbed! the QR might be an option, but the sound's quite localised to cassette/chain/insides. guess it could flex it out of alignment if a bit loose though, i'll give it a check. oh yeah, and it's a normally solid shimano xt skewer.
Bottom Bracket?
Yeah the Shimano ones are pretty good. Probably no prizes for me then!
Is this a hardtail or sus bike?
sus - i'm inclined to think it's something wearing/damaged rather than flex or similar, though, as it got progressively worse as the week went on.
It is very hard to tell where a noise is coming from, especially if you decide early. I helped a guy a while back who was experiencing a noise from his pedal every time he cranked hard - turned out to be the saddle rail, but once he told me it was the pedal it took me a while to look elsewhere.
yeah i'm with you on that - i'm trying not to pin it down, but when i take it in i want to be able to at least try to explain what i'm talking about! might have to get the mechanic out on the street with me and crank it hard to try to recreate it. 😆
ya in my experience of the old creaking noise it has either come from pedal threads that need greasing, seatpost / seatpost clamp, bottom bracket on way out, or bushes wearing out on sus!
Is it caused out of the saddle or when your sat down too?
all the time, and mostly towards the bigger sprockets on the block. after a while i was climbing the longest last climb at nant in 32x14 to try to stop it 😆
You rear mech hanger could either be slightly bent or loose, causing the chain to cross sprocket on the bigger cogs.
I found this out last week trying to get up Winnets..
well, it turned out to be a minor issue that was easily remedied but that i would not have noticed due to not being used to these fancy hubs. the QR inserts were screwed outwards a bit on both sides, meaning the frame was resting on those rather than the axle, and causing looseness in the cassette. luckily no damage and all sorted very quickly.
jackthedog was closest and so wins the prize. 🙂