I'm converting from Ultegra 6500 9speed. I have Ksyrium SL wheels that I got used so I don't know what year they are. I would be surprised if they don't accept a 10sp cassette but it's something to watch out for. The BB is the right size so I don't expect any problems there. I've considered the chain line being a problem since I'm putting a compact crank on. Is there anyway of knowing without putting it together?