The Ground Speed Voyager SV tire comes in 255/55ZR18. It has a Load Index of 109 which means the tire is rated to hold up to 2271 lbs. The tire has a Speed Rating of W so it is rated to go up to 168 mph. The UTQG rating is 500 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.