The 4-Wheel Steering version has two drive wheels at the center of each side and four steering wheels at the corners. It steers by angling the rear wheels in the opposite direction of the front wheels and reducing the speed of the inside drive wheel. The special "Ackerman steering" geometry helps all of the wheels align to the same turning center.

The Zero Turn version also has two drive wheels at the center of each side and four steering wheels at the corners. However, it steers by angling all four of the corner wheels inward ("pigeon toed"), so that the turning center is at the very center of the robot, and running the two drive wheels in opposite directions. This allows the rover to pivot in-place to maneuver in very tight spots.