The Cooper Discoverer STT PRO is a mud terrain tire specially designed for drivers who are looking for extreme durability, maximum strength, and solid comfort. On the road, this tire has explicable road manners but off the road, it can be the biggest tire to pulverize even the most challenging surfaces. Rated at M+S, the Cooper Discoverer STT PRO does best in snowy and muddy weather conditions. It features an Armor-Tek 3 carcass construction making it tougher and stronger so it can withstand extreme off road conditions. The large depth side bitters enhance grip and traction wet surfaces. The asymmetrical scallops on the lugs scoop mud so the tire can easily pull through muddy surface. The alternating 3-2 pattern of the inner tread rib provides a combination of benefits including noise reduction, stability, and superior wet and mud traction. Giving you a smooth and comfortable ride is the flex groove and staggered tread pitch.