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I got a new cassette in mid November and rode it with an old chain on it for about 270 miles. I realised over Christmas that the old chain, which I'd only fitted in February but is 2700 miles old, is totally goosed.
Today was my first ride on a new chain fitted to the nearly new cassette and while it's generally fine, under high load in the highest four gears there's a very occassional slip. I'd hoped the cassette was new enough to get away with it, but apparently not.
Given how new the cassette is, will it bed in to the new chain over time? Or is that it, cassette's dead and I should put the old chain back on and run the drivetrain until it's all totally kaput and then fit my new chains. It's made me wonder how the people who rotate chains do it - on this basis, swapping every four weeks would still lead to an unworkable set up and every fortnight seems like a hell of a lot of swapping.
A worn chain will wear a new cassette faster than a new chain I would have thought.
I'd run your old cassette and chain until dead.
It seems like a lot of effort to constantly measure and track things. I've always just run chains and cassettes together and replace both when knackered. It rarely seems to affect chainrings and I doubt the minimal gains in life are worth the effort.
It will, but it will also likely cause premature wear of both bits of kit. I suspect it is now past any point of saving so just keep riding it.
I agree with jonba, run chain and cassette together for ever, solve shift issues with new cables and lube/clean lots. I find the upgrade cycle comes round before they wear out...
It seems like a lot of effort to constantly measure and track things.
Yeah, normally I don't but on this bike I've been going through a chain and cassette every ten months or so (as in, they're slipping, not they're stretch to 0.73% or whatever) and would rather not replace stuff so often. I didn't measure the old chain - it was starting to not fit the chainring teeth properly because it's so stretched so I could see it was finished.
I'll stick the old chain back on then. I suspect when it finally gives up it'll be a new chainring/cassette/chain job.
I would try the new chain a bit longer. Chains being cheaper than cassettes.
run chain and cassette together for ever
I do this, run until shift issues (usually 1.5% stretch or more). I change the chainring too. Am I doing this unneccessarily?
This time around, I'm on a very expensive steel cassette, Hopefully this will last longer. Expect some nerdy analysis from me in a year or two as to whether this was financially worth it.
Blimey you did well not getting any I'll effects putting such an old chain on a new cassette sooner.
When I have gone too far with wear before putting a new chain on I have managed to do a few rides ,moderately peddle pressure and settle/wear it in again.Increasing chain wrap by reducing B Gap helps,to decrease slipping.This all depends on how far gone/tolerable it is-it will soon let you know on the climbs. May well be goosed though.
You can buy the individual cogs for the cassette, much cheaper than a cassette.
https://www.bikeparts.co.uk/products/shimano-cs-m9000-sprocket-11t
You're welcome.
Surprised it won't accept a new chain atfer that little mileage! My X01 Eagle cassette took a brand spanking new chain after 2000 miles with no issues at all!
Surprised it won’t accept a new chain atfer that little mileage!
May well be the chainring that is actually the culprit.
It's definitely not the chainring. They're in alright nick and it's only in specific cogs at the back. I'll give it a couple more rides.
Normally I'd run both into the ground, but the new chain will probably stretch into the wear of the cassette if you ride it gently for a bit.
I rode with a friend who had terrible chain skipping after putting a new chain on, it has almost vanished a few hours later.
To extend the life if the cassette and chain rings i run 2 chains and keep swapping around. So they wear slowly at the same rate.
The chain taken of goes in a jar of degreaser and shaken about then left to soak. Clean it off a day or two later then lube its ready for the next swap.
I get 2x the life out of the cassette that way.
Also if you bugger a chain when everything is quite worn, you've still got another rather than finding you have to replace everything.