[Dunngeon]

Originally Posted by Abhishek R

Depending on where your center of gravity ends up on the final robot, you can adjust which wheels you raise/drop and by how much, because your frictional/scrub force will be greater in the areas close to the CoG. All about the weight distribution.

My guess is it has more to do with the tilt/COM change that robots undergo when they are changing velocity and direction, rather than weight distribution and wheel friction.