The Roadone Aethon M/TX tire comes in 285/55R20. It has a Load Index of 122/119 which means the tire is rated to hold up to 3307 lbs. The tire has a Speed Rating of Q so it is rated to go up to 99 mph. It has a Load Range of E, which is also known as 10 Ply. This is maximum safe carrying capacity of the tire. A higher Load Range allows the tire to carry a heavier load. The tire comes in a Black Side Wall.