Brand: Arroyo Model: Grand Sport A/S Size: 275-45R21 275/45-21 275/45R21 275/45/21 275-45-21 275 45 21 2754521 Tread Depth: 10/32 Treadlife: 40,000 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: 275 Aspect Ratio: 45 Rim Diameter: 21 Production Year (DOT): N/A