The Cooper Discoverer All-Terrain 275/55R20 117T Tire has a 60K (SUV) 55K (LT) Treadwear Warranty. The tread design and internal construction helps the tire fight uneven wear to attain treadwear warranty. Sound Barrier Walls in the shoulders of the tire help keep tread pattern noise to a minimum. Repeating pitch sequence helps provide a smooth ride. Circumferential grooves and increased siping in the tread design help push water out of the tire s way for better wet and snow handling. Similar to its predecessor the tread pattern kicks out stones with the stone ejectors (in the intermediate grooves).