The Michelin Pilot Sport 4 tire comes in 275/45ZR18. It has a Load Index of 107 which means the tire is rated to hold up to 2149 lbs. The tire has a Speed Rating of Y so it is rated to go up to 186 mph. The UTQG rating is 320 AA A. UTQG is a system of ratings that measures the Treadwear, Traction, and Temperature of the tire. Click here to learn more about the UTQG ratings. The tire comes in a Black Side Wall.