Originally Posted by
tatfiend
Agreed, the spoke protector on my Surly Big Dummy failed within about 3 months causing drag on the freehub cassette when coasting or back pedaling. If bad enough this can damage a derailleur too.
I can see the little snap teeth breaking off and allowing the disc to scuff away at the freehub. But come on now, how's the whole disc going to come off and damage or jam the derrailleur?