Brand: Armstrong Model: Tru-Trac SU Size: 255-45R20 255/45-20 255/45R20 255/45/20 255-45-20 255 45 20 2554520 Tread Depth: 9/32 Treadlife: 65,000 miles Season: All Season Performance: High Performance Car Type: Truck/SUV Load and Speed Rating: 105Y Speed Rating Description: Speed Rated Up to 186 mph Section Width: 255 Aspect Ratio: 45 Rim Diameter: 20 Production Year (DOT): N/A