Originally Posted by
andy_p
I'm pretty certain that my stand isn't accurate, because I tested it with my nicest wheel (and no, not one I made myself

).
One of the caliper arms was closer to the rim, even after flipping the wheel over in the stand.
I have the Park Tools stand with self-centering calipers - it makes me wonder if something is wrong with the stand (I got it second hand).
If it's a TS-2.x, there's a procedure available from the PARK website to set them correctly.
Yours aren't.
I picked up my stand used and it HAD the same problem.
Now it doesn't.
I