Brand: American Roadstar Model: Sport A/S Size: 325-30R21 325/30-21 325/30R21 325/30/21 325-30-21 325 30 21 3253021 Tread Depth: 10/32 Treadlife: 50,000 miles Season: All Season Performance: High Performance Car Type: Truck/SUV Load and Speed Rating: 110Y Speed Rating Description: Speed Rated Up to 186 mph Section Width: 325 Aspect Ratio: 30 Rim Diameter: 21 Production Year (DOT): N/A