But I don't follow when you say that the tire springs in an arch. What do you mean by that?
This is an extreme example, but if you have a 8" wheel with 4" BS it will pivot absolutly centered, if you had 0" BS on an 8" wheel the tire will actually swing forward and back.
The example on the right would be the same as having 2" BS wheels with 2" wheel spacers.
