Bike Forums - View Single Post - Smallest cog on cassette broken when trying to remove cassette.
Old 03-04-18, 10:56 PM
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You may be talking about the cassette digging in to the freehub

& making gouges, sometimes making it hard to remove the cassette.

This is common-normal. If it gets too bad, the freehub can be replaced. Keeping the lockring tight helps to minimize this happening.

Filing down the raised bits is fine & makes the new cassette go on easier.
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