Brand: Royal Black Model: Racing Trac Size: 255-55R18 255/55-18 255/55R18 255/55/18 255-55-18 255 55 18 2555518 Tread Depth: 7/32 Treadlife: N/A Season: All Season Performance: High Performance Car Type: Truck/SUV Load and Speed Rating: 109W Speed Rating Description: Speed Rated Up to 168 mph Section Width: 255 Aspect Ratio: 55 Rim Diameter: 18 Production Year (DOT): N/A