Brand: Pirelli Model: P Zero (PZ4) Size: 285-30R21 285/30-21 285/30R21 285/30/21 285-30-21 285 30 21 2853021 Tread Depth: N/A Treadlife: N/A Season: Summer Performance: High Performance Car Type: Truck/SUV Load and Speed Rating: 100Y Speed Rating Description: Speed Rated Up to 186 mph Section Width: 285 Aspect Ratio: 30 Rim Diameter: 21 Production Year (DOT): N/A