as i've said on another post, a great way to mount your tires on the rims is to use a drum sander on a drill press, or a spindle sander and sand the inside of the pipe to fit really tightly on the rims. you shouldnt be able to push the rims in the tires when youre done sanding. next, put the rims in the freezer for about an hour, then put the tires in a toaster oven or normal oven for a few minutes at 150 celcius. if you start to smell hot plastic, theyre done. take them out, and put the frozen rims in. they'll fit in perfect. let the whole thing cool and you wont be able to get the tire off again without puttin a small slit cross-tread ways. this way, no glue, no mess. it works great.