You can make a dishing tool out of thick corrugated cardboard. Just measure the distance on one side of the wheel then put the cardboard on the other side and see the difference in the distance.
Make it look like this, where the hashes are a ruler, the sides of the tool sit on the machined part of the rim:
You can make a dishing tool out of thick corrugated cardboard. Just measure the distance on one side of the wheel then put the cardboard on the other side and see the difference in the distance.
Make it look like this, where the hashes are a ruler, the sides of the tool sit on the machined part of the rim:
Edit: ASCII art did not come out :(