[sanddrag]

Originally Posted by Greg Needel

Basically since your robot weight is a constant and your CG is basically the same with both smaller and larger wheels, your traction actually does not change based on wheel width, assuming the same traction material on narrow and wide wheels.

That's what simple physics tells you, I know. But I have a feeling the interlocking action both on a macroscopic and microscopic scale between tread and carpet is anything but simple. Why do drag racing cars use such wide tires in the back?