Using these heavy - duty wheels is easy. First, check if your robot is compatible with the .77 - inch hub pattern. If it is, simply attach the wheels to the appropriate parts of your robot. When using the wheels, make sure the surface is clean and free of debris to avoid damage to the rubber tire. As for maintenance, regularly check the plastic core for any cracks or damage. If the rubber tire starts to show signs of wear, it may be time to replace it. Also, keep the wheels away from extreme temperatures and chemicals, as these can affect their performance.