here's another little trick. when removing the old tire, spoon the tire off on both side of the rim. the wheel will drop down inside the tire and can be pulled out of the center with little or no effort. also, get a rat tail file and open up the hole in the rim that the tube stem comes through. this will give the stem some room if tire or tube should move on the rim any. this may start some debate but, you only need one rim lock. put the other on the shelf.