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.
This is a prebuilt version of TP-251-003, our programmable triangular omni wheel vectoring robot. It can vector in any direction and is great for indoor robotics. An Arduino Mega and encoders allow for this to be an autonomous robot.