Using these Cosmis XT - 006R wheels is straightforward. First, make sure you have the right aftermarket conical/cone seat 60 - degree lug nuts as the wheels require them. Before installation, double - check if the wheels are compatible with your vehicle. You can do this by referring to your vehicle's manual or consulting a mechanic. During installation, you might need to make some minor modifications to ensure a perfect fit. Once installed, these wheels come with center caps that you can easily place on. As for maintenance, regularly clean the wheels with a mild soap and water solution to keep them looking white and shiny. Avoid using harsh chemicals as they can damage the finish. Also, check the lug nuts periodically to make sure they're tightened properly for safety.