Originally Posted by cny-bikeman

The dishing gauge I mentioned is the best way to check a wheel. A truing stand is no better than flipping the wheel in the frame for this small an error. There is a method to check dish that FBinNY has suggested before. Take the tire/tube off the wheel and find a nice, flat surface larger than the wheel. Support the rim with three stacks of quarters in a triangle, high enough to hold the axle off the surface. Measure the gap between the axle end and the surface. Carefully lift the wheel off the quarters and flip to the other side. If there's a difference in measurement then the wheel is not dished.

Frames do not come out of alignment without some major force applied to them.