[EricH]

Originally Posted by Mentor08

We are using 4 motors, 4 wheel drive, 2 drive chains per side, 2 high friction aluminum wheels, and 4 omni wheels (2 on left together, 2 on right together). Is it better to put the omni wheels on the front or on the rear?

How about opposite corners?

It would depend on your application, where you want the robot to rotate around, and how easily you want to be turned. Putting them in opposite corners reduces the last factor.