Brand: Greentrac Model: Quest-X Size: 275-40R18 275/40-18 275/40R18 275/40/18 275-40-18 275 40 18 2754018 Tread Depth: N/A Treadlife: N/A Season: All Season Performance: High Performance Car Type: Truck/SUV Load and Speed Rating: 103Y Speed Rating Description: Speed Rated Up to 186 mph Section Width: 275 Aspect Ratio: 40 Rim Diameter: 18 Production Year (DOT): N/A