Time for new Cassette?
10-04-15, 08:45 PM
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Time for new Cassette?
Couple newb questions. Got a new chain and the thing is skipping on multiple cogs. I replaced the chain with the same model - so I'm assuming that means time for new cassette? I probably should have replaced the chain some time ago - I've probably put around 2k miles on the old chain and cassette.
So I have a 12-27 and was just going to get same so to reduce hassle. If I got something pretty similar like a 12-25 would I need to adjust the DeRailleur?
So I have a 12-27 and was just going to get same so to reduce hassle. If I got something pretty similar like a 12-25 would I need to adjust the DeRailleur?
10-04-15, 09:04 PM
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Not all skipping is caused by the new chain on old cassette phenomenon. While it's possible, I wouldn't have have expected that a cassette could wear to where a new chain skips in so few miles.
Also the new/old issue usually affects only the one or two most used sprockets, and/or the smaller ones.
So before giving up, I'd do some due diligence and check for things like RD trim.
OTOH - if you saved the old chain it's the best clue about the current issue. If it's stretched only 1/2% or so, then odds favor the cassette being OK. More than 1% odds are against the cassette, and in between then anybody's guess.
Also the new/old issue usually affects only the one or two most used sprockets, and/or the smaller ones.
So before giving up, I'd do some due diligence and check for things like RD trim.
OTOH - if you saved the old chain it's the best clue about the current issue. If it's stretched only 1/2% or so, then odds favor the cassette being OK. More than 1% odds are against the cassette, and in between then anybody's guess.
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“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
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Last edited by FBinNY; 10-05-15 at 04:52 AM.
10-04-15, 09:24 PM
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You should not have to make any changes going from 27 to 25.
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10-05-15, 04:47 AM
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Got a new chain and the thing is skipping on multiple cogs. I replaced the chain with the same model - so I'm assuming that means time for new cassette? I probably should have replaced the chain some time ago - I've probably put around 2k miles on the old chain and cassette.
I didn't want to fork out the cash so Checked chain again.
I'd mis threaded the chain around the rear derailleur. I'm not suggesting that you're as cack handed as me mearly that a new cassette may not be the answer
10-05-15, 06:10 AM
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A 12-25 cassette won't result in any other "adjustments" that any other cassette wouldn't require.
Due to manufacturing tolerances, you may have to turn the barrel adjuster from 0 turns, up to a 1/2 turn. That's just normal.
Going to a smaller largest cog MIGHT allow you to shorten the chain 1 linkset, but it wouldn't be necessary.
Due to manufacturing tolerances, you may have to turn the barrel adjuster from 0 turns, up to a 1/2 turn. That's just normal.
Going to a smaller largest cog MIGHT allow you to shorten the chain 1 linkset, but it wouldn't be necessary.
10-05-15, 07:53 AM
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10-06-15, 03:03 AM
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10-06-15, 03:25 AM
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Perhaps a b-screw adjustment on RD. To keep it closer to the 25 cog.
10-08-15, 11:48 AM
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