Time for new Cassette?
10-04-15 | 08:45 PM
#1
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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
#2
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 10-05-15 at 04:52 AM.
10-04-15 | 09:24 PM
#3
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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
#4
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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
#5
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From: Mid Willamette Valley, Orygun
Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3
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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10-08-15 | 11:48 AM
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