Cassettes that fit the Specialized S-Works Demo 11

We know this bike runs SRAM T-Type Flattop chain, SRAM XD freehub, but not its speed count — and a cassette has to match that before anything else matters. We'd rather tell you that than guess: the wrong cassette won't mount on the hub, or won't shift once it does.

Our guide to identifying your freehub walks through reading the speed count, gearing and freehub body off the bike itself.