A wheel truing stand is a specialized tool for "truing" (straightening) bicycle wheels.[1][2] 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. Proper wheel alignment includes lateral, radial and dish/centering trues which keep the wheel straight and strong. 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.
The most important tool for truing wheels is a truing stand.
If a truing stand is available, use it