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Hi, what do you think? Chain is in v good shape, about to replace front inner ring. But some cassette rings look a little worn to me.
Thanks
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you're aware some are shaped differently to help with shifting ?
The outermost and innermost do look worn, you can see the shark fin shape very clearly. Middle sprockets look okay.
If it performs fine with the new chain I would still run it until it starts slipping.
It's really hard to tell. I had an Ultegra cassette with a 0.75% worn chain that looked fine, but skipped on a centre sprocket with a new chain, so had to be replaced. Chain measuring tools are relatively cheap, but I've never found an equivalent for cassettes. Do they even exist?
Edit: Yes, this is a thing. Are they any good?