I remember when I used to bust multi-piece rims all day!! Just like Mike B said. If you have two of the pry bars, you can walk those rings off. Another tip. After you bust the second bead, you pick up the assembly and, using a block or something under the rim, you kinda slam down the assembly and, hopefully, the tire slides off the rim. I used to use an old 16.5" rim under the 20" rims. Anyway, the tip is, if the tire doesn't slide off the rim, you can use the slide hammer to knock it down off the rim. A lot of times there is a rust ring that forms where the liner sits preventing the tire from sliding off. Also, one component of our safety program was to deflate in a cage and inflate in a cage. Don't inflate the tire to "pop" off a stuck bead. Stand at an angle to your cage when you inflate ( out of the trajectory areas )and use a 72" plus air chuck.
