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Cassette Wear

Old 05-01-22, 08:23 AM
  #1  
Gummomarx
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Cassette Wear

As my chain started skipping, I reckoned I should change it - happy enough that it lasted two years. However, on the first ride, the skipping was much worse, so I suspected that the cassette would need replaced also.

I'm a bit perturbed because I had replaced the chainset, chain and cassette at the same time two years ago and I wonder should a cassette not last longer, in spite of my propensity for riding on filty country lanes in search of that Pulitzer prize-winning landscape shot.

Anyway, please have a look at my photos of the cassette, at different stages of rotation and let me know if there's anything glaringly wrong with the teeth.

Gummo
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Old 05-01-22, 08:28 AM
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bboy314
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Hard to say from visual inspection but those smaller cogs look pretty worn to me. 2 years is a pretty long run on one chain if you ride a lot. Replacing the chain more regularly will help extend the life of the cassette.
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Old 05-01-22, 08:29 AM
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work4bike
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It's become common practice for me to just replace both at the same time. I don't bother with measuring the chain, I simply wait for the first skip of the drivetrain and then I replace both. I know many here will condemn me for this practice, but I find it a perfect way to solution.
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Old 05-01-22, 08:43 AM
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Originally Posted by work4bike View Post
It's become common practice for me to just replace both at the same time. I don't bother with measuring the chain, I simply wait for the first skip of the drivetrain and then I replace both. I know many here will condemn me for this practice, but I find it a perfect way to solution.
I do the same thing. When the chain has "stretched" over 1/2% I replace it and the cassette. I'm using relatively inexpensive cassettes (10-speed Tiagra, 105 or Ultegra) so they aren't much more expensive than a decent chain and sacrificing multiple chains to protect the cassette doesn't make economic sense.
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Old 05-01-22, 09:11 AM
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Originally Posted by work4bike View Post
It's become common practice for me to just replace both at the same time. I don't bother with measuring the chain, I simply wait for the first skip of the drivetrain and then I replace both. I know many here will condemn me for this practice, but I find it a perfect way to solution.
I replaced it as soon as I noticed the skip (it doesn't get any better). Looks like two years for cassette and chain for me then.
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Old 05-01-22, 09:13 AM
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Originally Posted by HillRider View Post
I do the same thing. When the chain has "stretched" over 1/2% I replace it and the cassette. I'm using relatively inexpensive cassettes (10-speed Tiagra, 105 or Ultegra) so they aren't much more expensive than a decent chain and sacrificing multiple chains to protect the cassette doesn't make economic sense.
I normally use this cassette - any recommendations for a better alternative?
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Old 05-01-22, 10:10 AM
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Originally Posted by Gummomarx View Post
I replaced it as soon as I noticed the skip (it doesn't get any better). Looks like two years for cassette and chain for me then.
No, it doesn't get any better, in my experience, the skip usually gets worse with just a chain replacement.

I'm not making a recommendation, but I usually just buy a SRAM PG 850 11-28 cassette (~$25) and SRAM PC 830 8-speed chain ($20) for a total of a little under $50. As long as I keep my sprints to a minimum I can usually get about 5,000 miles (give or take) out of them.
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Old 05-01-22, 10:50 AM
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It is generally good to replace both at the same time as they do wear together but if you are trying to use a cassette on another chain, make sure you are replacing that chain more often. Two years with a lot of riding is probably maxing everything out very frequently and is not needed. Replace that chain before it is worn out and you might get better life on your cassette or just understand they are both wear items and replace them together.

People try to over maximize these things too often certainly don't just replace willy nilly but don't let them go till everything gets sloppy and wears out derailleurs and chainrings and such.
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Old 05-01-22, 10:57 AM
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Are you certain that the chain is skipping on the cassette and not one of the chain rings?
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Old 05-02-22, 09:53 AM
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Originally Posted by work4bike View Post
It's become common practice for me to just replace both at the same time. I don't bother with measuring the chain, I simply wait for the first skip of the drivetrain and then I replace both. I know many here will condemn me for this practice, but I find it a perfect way to solution.
How much elongation do you see when your chain gets to the point of skipping? I suspect it has worn quite a bit and that then accelerates wear on the chain rings. If you let your chains go to 1/2 % then typically you can get two chains per cassette. It's such a simple maintenance procedure to measure your chain, I don't understand why people don't do it.
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Old 05-02-22, 12:55 PM
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Originally Posted by KerryIrons View Post
How much elongation do you see when your chain gets to the point of skipping? I suspect it has worn quite a bit and that then accelerates wear on the chain rings. If you let your chains go to 1/2 % then typically you can get two chains per cassette. It's such a simple maintenance procedure to measure your chain, I don't understand why people don't do it.
I don't even measure it, I just replace both, since I get descent mileage out of them, usually no less than 5,000 miles and I've had over 6,000 miles, which is about the expected life span of a cassette, from what I understand. I usually buy a new bike before my chainring gives out, but I did have one die on me at the 25,000-mile point and that was a bike I hardly did any maintenance on.
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Old 05-03-22, 01:07 PM
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Originally Posted by Iride01 View Post
Are you certain that the chain is skipping on the cassette and not one of the chain rings?
I've been hoping it wasn't - the first chainset lasted from 2014-2020 - the identical replacement is on less than two years.

Last edited by Gummomarx; 05-04-22 at 08:48 AM.
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