The Nama MAXMACH NM-31TH tire comes in 225/40ZR18. It has a Load Index of 92 which means the tire is rated to hold up to 1389 lbs. The tire has a Speed Rating of W so it is rated to go up to 168 mph. The UTQG rating is 420 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.