Tired of truing up a tire, putting it on your car and it's the shape of an egg? We've all done it. Or you just want to square up your rears to even them up, so you touch them up and BAMMO, they're both so far out of round you can see your car bouncing... THAT SUCKS. This rim supporter SOLVES THAT. Pop your rim on your tire truer, slide this baby on down so it's resting on the mounting surface of the rim (where the screws go through), and tighten it all up. Bang, you have a perfectly trued rear tire.
Speed up your time doing tire truing and get perfect results when you're done. This thing pays for itself the first time you use it. Could be the tool of the year for 1/12th scale guys.
6mm bore on one side 8mm on the other.