If I change my cassette to a new one, should I also change the chain?
I measured the chain with a wear gauge and it's ok.
Just to emphasize the obvious: I'm changing the cassette to one of exactly the same type.
Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. It only takes a minute to sign up.Sign up to join this community
Depends on how worn the chain is. If it's relatively new go ahead and use it. If it's at or approaching 0.5% stretch, just get a new one.
As a rule of thumb, new cassette and new chain. Keep the old one as a spare, but 250 miles is nothing and would be good to go with a new cassette. Generally you should get 2 to 3 chains per cassette.
The consensus seems to be that a worn chain will accelerate cassette and chainring wear. I think if it’s not worn much (you could measure with a sliding caliper) you could keep using it. Otherwise install a new chain and use the current chain when it’s time for a chain replacement.
Worn chain on new chainrings can cause chain suck, but I think this is not the case for cassettes.