For wheels to perform properly, it's important that the rims be centered over the hubs. To check this, and to make precision adjustments, Park's Portable Wheel Dishing Tool is a must. It disassembles quickly for storage or travel and allows you to easily check centering on road, mountain and BMX wheels from 24 to 29 inches in diameter and it works with any hub. The Wheel Alignment Gauge is a necessity for every wheelbuilder.