Our 1/10 - 1/12 Arbor is for oval or on-road pan cars. Now fits more wheels with a new longer center shaft which is now cut from the same piece of aluminum that the arbor is cut from. This hand crafted aluminum tire truer adapter fits Hudy, OFNA, Integy & any truer that takes an 8mm shaft. Fits both 1/10 and 1/12 onroad wheels both fronts and rears. Clamps to your tire truer shaft instead of using a set screw that scars the shaft. The center threaded stud has been lengthened for you TM Tires racers.