I've just replaced my chain and cassette and it's never been so noisy. As soon as I put down any significant power the chain seems to migrate very slightly inwards towards the wheel, and then big on the larger cog.
Chain is a KMC X10 93
Cassette a Deore HG500 11-42t
No compatibility issues in theory (that I know of)
Any clues to what's up? Or will it probably settle down with a few more hours riding? (it's only had 4-5 hours so far)
KMC are great chains and Shimano make great cassettes.
Assuming you have the right chain and cassette for your bike, then it would either be a set up issue (derailleur needs adjusting) or potentially the derailleur is bent!
+1 on the derailleur set up. Ran various KMC chains and shimano cassettes 9/10 speed for 5 years with no compatability issues.
KMC make most of shimanos chains, i doubt they'd be daft enough to make their *own* chains incompatible with the largest manufacturer in the world.
As above, rear mech, hanger, hub/freehub bearings.
Or you've put the cassette on wrong (spacer missing or soemthing)
I just had a similar problem on my SRAM XO1 setup. Turned out to be the chainring. Weird, but true.
Have you checked the chainring and jockey wheels are OK?
.
So is this happening at the small end of the cassette, ie when in gear 10 the chain binds on gear 9?
I always use kmc chains, but when new I can't fit my park tools chain checker in, which I presume means the links are quite closely spaced. Always seem to work ok though so have always assumed perhaps my checker is dodgy or that it doesn't matter.
I bet the chain will quieten down as it wears in.
I usually use GT85 to remove the waxy coating new chains tend to come covered in and then lube them up.
What hub are you running; do it need a spacer* for 9/10 speed cassettes that you might have forgotten to put back on (no idea if this would cause your symptoms though)?
* I'm going to have to try to remember when I change the cassette on my Hope Pro 4s not to throw the spacer out with the old cassette!
It's probably a worn chainring. Sounds similar to a mystery noise I had when i put the same KMC chain only my XT 11-42 set up.
Get someone to watch you side on as you pedal and check if the chain is sticking, as it comes off the 6 o'clock positon, to the teeth closer to the rear tyre (if that makes sense).
Really getting through narrow wide chainrings quickly these days - about 3 a year with my weekend warrier riding!
Thanks for the replies 🙂
I assume it isn't a chainring issue as when I'm in the smaller sprockets or the largest one, all is quiet, but I could be wrong and I have had it for a little while (the teeth look good though)
It's a 10sp cassette on an 11sp Hope freehub with a spacer on the inside
It's only particularly noisy when I'm on the largest few sprockets (but not the largest one) and pedalling hard -- the chain then rubs on the bigger sprocket to the left. I've definitely not missed out any spacers, most of the cassette is one-piece anyway
Hoping it'll will settle down but I'll have another look this weekend anyway