I made an attempt at converting a 29" wheelset that had the speed disc rims. You'll have to get the Stan's conversion kit and drill out the inner wall of the rim a bit at the valve. Getting the right amount of rim strip was pretty tough but I was able to get one of the tires to seal up. I tried to do the second one and ended up seting it aside to avoid going completely insane. Soon after I found a fairly cheap used set of Stan's wheels so I never did finish the conversion. My advice would be to stick with tubes.