Just a quick one here. I've got a set of Mavic Ksyrium Elites that I've been running a 9 speed shimano cassette on for the last few years. I purchased an 07 Roubaix, which is 10 speed, and am looking at getting a cross bike which will possibly be 10 speed. I'd like to have the ability to use these wheels on either bike, but is the 10 speed cassette splines compatible with the 9 speed freehub body that is on the Mavic wheel?? Sorry, but I'm new to this whole 10 speed thing and I actually don't have the Roubaix in my possession yet, or I'd just remove the new cassette myself.