• Sound silly but is the cassette 100% on correctly? I’ve seen one with the smallest cog not properly fitted but the long lock ring engaged, although just barely.

  • Yeah, I've been through the loose cassette thing. I once had a cassette come loose in Scotland because it was tightened up on an angle against a burred freehub body so I'm very anal when it comes to making sure the cogs are all straight and the lockring is straight before fully tightening it.

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