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replacing chain(3 posts)

replacing chainkonaken
Nov 27, 2001 9:24 PM
I know this question has been asked before but I can't find it in the archives...
I have roughly 1800 - 2000 miles on my cass and chain.
Can I replace just the chain or does the cass need to go as well? Also, what is a good rule of thumb for changing (i.e. mileage tables)?

Thanks in advance,

Ken
re: replace chaindzrider
Nov 28, 2001 5:21 AM
I replace the chain. If any of the gears skip after the first 30 miles or so I change the cassette. Sometimes I replace just the offending cog. I don't count miles, but my guess is chains last 1500 - 2000. Cassettes usually survive 3 chains.
Agree with dznee Spoke Wrench
Nov 28, 2001 6:39 AM
I don't know of a reliable way to inspect a cassette to tell if the cogs are too worn to match up to a new chain. On my own bikes, I just do what dz does, replace the chain and if athe cassetted works, I don't try to fix it.

For customer bikes, I kind of evaluate the customer. People who I think understand bikes and ride a lot, I advise them to do like dz does. People who just want the bike fixed right the first time with no questions asked get the new cassette treatment.

Chain life varies depending on usage. Chains for road bikes that are well maintained and only get ridden on sunny days can last a long time. Chains for mountain bikes that are used for fording streams don't last as long. I measure the chain and replace it before two of the link pins get to be 12 1/8 inches apart.