Brand: Accelera Model: Iota ST68 Size: 285-40R21 285/40-21 285/40R21 285/40/21 285-40-21 285 40 21 2854021 Tread Depth: 10/32 Treadlife: 35,000 miles 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: 285 Aspect Ratio: 40 Rim Diameter: 21 Production Year (DOT): N/A