285 40 R21 Goodyear Eagle F1 Asymmetric2 SUV 1097 ROF Tyre Runflat The Eagle F1 Asymmetric 2 SUV-4X4 is Goodyear's Street/Sport Truck Summer tyre developed for advanced high-performance crossover and sport utility vehicles. Designed to provide control without conceding comfort, the "Asymmetric" in the Eagle F1 Asymmetric 2 SUV-4X4's name describes both the tyre's tread design and internal structure, both of which enhance on-road performance in dry and wet conditions. The Eagle F1 Asymmetric 2 SUV-4X4's tread compound combines Goodyear race traction resins for dry grip, high surface silica for wet traction, and high molecular weight polymers to optimize tread stiffness. This compound is molded into an asymmetric tread design with a wide, solid outboard shoulder to increase cornering traction and continuous notched inboard ribs to improve high-speed stability. Goodyear's ActiveBraking Technology 3-dimensional tread element designs increase surface contact with the road to reduce stopping distances during heavy braking, while its wide circumferential grooves disperse water from the tire footprint. The internal structure of the Eagle F1 Asymmetric 2 SUV-4X4 includes twin steel belts reinforced with spirally wrapped polyamide cord to enhance tread stability and high-speed capability. Goodyear's lightweight, racing-derived construction lowers unsprung mass to increase performance while their crossed plies casing improves steering precision, handling, and stopping power.