Wheel truing stand

A wheel truing stand is a specialized tool for "truing" (straightening) bicycle wheels. Individual models differ slightly, but all consist of an axle stand on which the wheel can rotate and calipers, to measure slight deviations of the wheel's rim from ideal alignment. The stand is used in conjunction with an appropriately sized spoke wrench to loosen or tighten the spokes that connect the wheel's hub to the rim.