The 4 inch (100mm) Nexus Robot double plate aluminium Omni wheels have rubber rollers mounted along its circumference to help avoid slipping. Each roller has two bearings which allow the wheel to move smoothly and easily in ANY direction.
These heavy duty 8 inch (203mm) aluminum mecanum wheels allow your robot to easily move laterally, diagonally, or spin in a circle. This set includes four wheels. These use ball bearings for smooth operation and high load capacity.