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Just interested in checking visually if my cassette looks worn, esp largest and 3rd largest sprockets. It's a Sunrace 46T, not done too many miles but making a curious noise in 1st and 3rd when muddy. Chain is not yet at 0.75
Thanks
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looks ok to me
looks fine to me also.
Check your indexing, chainline and hanger is straight.
Another vote for fine.
Are you sure it's not noise coming from front narrow wide chainring,all of mine have always grumbled and growled when muck gets onto them and the chain-due to the tighter contact of the wide teeth me thinks.
not done too many miles
It's fine. Post back when it's done 2000/3000+ miles. It'll be fine even with chain up to '1' wear and beyond, so long as you don't change the chain.
Noise when muddy is not uncommon. If in certain gears, check indexing.