thinned braking surface equal more heat in that area, transfers to tubes and kaboom on decents. I've seen/heard bead blow out on carbon wheel on STEEP fast decents.
I was looking at those Zipps on their site last week and some local zipp 404 that ended up silver hub 10spd. In the end I ordered new wheels from Reynolds for 1300 shipped. a hundred more but I'll get a warranty and new brake surface to dig into. Lifetime warranty w/ Reynolds
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Rule #10 // It never gets easier, you just go faster.