Got a portable tire changer that is flimsy and awkward to use and scratching your rim? Give it an upgrade with this modification designed by flskevin.

Basically your going to add 2 Posi-Clamp® Spools from NoMar ¹⁾ on a home made riser block (this one is made with aluminum on bottom & steel on top) that is then bolted to each leg slider of the tire changer. It doesn't have to be two pieces but it just needs to be strong enough to hold the wheel assembly safely and tall enough to clear the bottom with your disc and sprocket installed. Measure between (center side of each) the inside 'v' of the spools and the inside edge of the original back plate on the leg slider (in this case, 1/2“). Since the spools change the dimension from the original back plate to center of the machine, drill a new hole in each leg slider (1/2”) toward the center to set the leg sliders back to center of the machine. Cut some pieces of an old inner tube, take apart the beam connections and install the inner tubes between the connections to tighten up the joints when beams are re-installed. Then install a smaller diameter center tube (from any hardware store) so it won't bind up in the bearings.

YouTube video of the mods in action: https://www.youtube.com/watch?v=62WApQLAb5E