Using these heavy-duty wheels is easy. Just attach them to your robot using the 1.5-inch hub pattern. If you need to use a 0.77-inch hub pattern, remember to use the 1.5-inch to 0.77-inch Hub Adapter. When building your robot, take advantage of the Actobotics system's standardized hole patterns to connect components quickly. As for maintenance, keep the wheels clean. Wipe the rubber tire regularly to prevent dirt buildup. Check the plastic core for any signs of cracking or damage. If you notice any issues, replace the wheel right away. These wheels are built to last, but proper care will ensure they perform well for a long time.