Originally Posted by
caloso
Do you know if your current wheel's freehub will accept an 11-speed cassette? That would seem to be a limiting factor. (As an aside, I've picked up a few really nice 10-speed wheelsets from folks who had "upgraded." My son and I have 4 10-speed bikes between us and it's great to be able to swap wheels for whatever the purpose, especially on our CX bikes.)
Shimano's 11-34T cassette will fit on a 10-speed hub. (It comes with a spacer that is required for a normal road 11-speed hub.)