Park Tool TS-4.2 Professional Wheel Truing Stand. The Park Tool TS-4.2 Professional Wheel Truing Stand is designed to fit a wide range of hub wheel and tire combinations with room to spare utilizing a wider base structure and larger calipers. More accurate and easier to calibrate the versatile TS-4.2 is solidly built to accommodate and self-center nearly any diameter wheel 16″ to 29″ and any tire width up to 5″+.