Wheel truing stand
From Wikipedia, the free encyclopedia
A wheel truing stand is a specialized tool for straightening bicycle wheels. While individual models differ slightly, it consists of an axle stand on which the wheel can rotate and calipers, to measure slight deviations of the wheel's rim from ideal ("true") alignment. The stand is used in conjunction with an appropriately sized spoke wrench to loosen & tighten spokes that hold the rim in position.