I just bought a Canondale CAADX Ultegra Disc cross bike. I was thinking about looking into getting another set of wheels so that I can have a set of road slicks on one wheelset and knobie's on another set. I'm not sure what to look for as far as road wheels for this bike? Are wheels disc specific? If so, any recommendations on a set of disc specific wheels. I don't need the lightest in the world, but don't want something that is going to be heavier than the wheels that came on the bike. I'm a clyde, current weigh in at 220, so that is something to keep in mind also. Thanks for any advice\info.