I'm currently on the XM321 and previously on F219. They are a great rim for mid-heavy weight use. The only reason I swithed was to have new wheels built when I got my Kings and the F219 was not available. I hit the scales at 215lbs and have used them for everything from trail riding to DH racing. The are the same rim so if you can find a deal on the older F219's get them!Crusher said:Just was wondering if any clyds is using this rim, I'm thinking about getting it or the Sun Rynho light. Ive heard the Suns are a pain in the arse to change a flat. Im pushing 235 lbs now. Any input would be great.