Brand: Atlas Tire Model: Force UHP Size: 255-35R21 255/35-21 255/35R21 255/35/21 255-35-21 255 35 21 2553521 Tread Depth: 9/32 Treadlife: 50,000 miles Season: All Season Performance: High Performance Car Type: Truck/SUV Load and Speed Rating: 101Y Speed Rating Description: Speed Rated Up to 186 mph Section Width: 255 Aspect Ratio: 35 Rim Diameter: 21 Production Year (DOT): N/A