The Grit Master GTM 4X4 HP 01 tire comes in 235/55R18. It has a Load Index of 104 which means the tire is rated to hold up to 1984 lbs. The tire has a Speed Rating of V so it is rated to go up to 149 mph. The UTQG rating is 480 A 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.