Originally Posted by
jack002
I usually sight along the side of the rim to the other side on both sides or try to pull a string along both sides of the rim from one side to the other to see where the center of the rim lies on the hub. That should tell you if the dishing is right.
That's not really going to do it very well, unless you measure from the string to the locknut on both sides, which is a bit labor intensive when it's much quicker to use the frame.