TWERGO® heavy-duty casters integrate multiple wheels into the standard footprint normally occupied by one wheel. TWERGO®’s patented parabolic wheel face with tapered tread design — coupled with a 2-in-1 and 3-in-1 wheel configuration — promotes increased ergonomics and ease in starting and maneuvering carts. Also, TWERGO® utilizes multiple wheels in that are side by side with no center support bar. This design reduces surface contact and allows the wheels to rotate in the direction and amount that will minimize friction, resulting in less force exerted.