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After snapping a year old KMC X10 chain while out last week, I grabbed a new Shimano HG-54 while passing the LBS and fitted it this afternoon. Seemed fine when on the work stand, but as soon as I rode it and put pressure on the cranks it just ripped itself off the outer chainring in pretty much most gears. Same on the inner chainring. Old chain is in the bin - never even measured it for stretch. Completely wrong chain, or possibly worn out chainrings? Any suggestions ..?
For reference, it's an SLX M677 2x10 22/36 crankset, same age as the chain. Are they made of cheese...?
Assuming it’s a 10 speedd chain, Certainly sounds like worn chainrings, and I’d suspect your cassette isn’t in great nick either. Soz!
Is it on the correct way around ? Shimano chains only work properly one way, the "Shimnao" stamp logo needs to be facing out from the bike.
Definately slipping on the chainrings and not the cassette?
Yes you can wear a drivetrain out in a year. If the old chain is worn past 0.75 a new chain will probably slip on the cassette, normally test ride the chainrings to check. If they are badly worn they will be visibly deformed.
If you're snapping a chain, those chainrings are likely goosed. As will be the cassette, most likely.
New chainring, and cassette. A year isn't that bad at all really.
Have the bin collectors been? Best bet with a broken chain is to reuse it. Or at the least check it to see how much wear its got.
Hmmm, bugger. Hadn't even noticed it'd been a year until I sat down and thought about it to ask the question. And it's had a hard year, to be fair. Really bad timing though, as I need it sorted for next weekend's Peak District Pioneer.
Question is, do I spend £100+ on end-of-line like-for-like components, or half that on a wide-range cassette and single chainring...
Check all the chain links you might have a stiff one or a seized one