The g-Force Rival is BFGoodrich's Extreme Performance Summer tire developed for sports car, muscle machine and pro-touring car driving enthusiasts who want their tires to turn heads on the street and lower lap times at the track. Created with razor-sharp reflexes, the g-Force Rival is designed to raise the limits by delivering extreme grip that's extremely predictable. However, like all Extreme Performance Summer tires, these tires are not intended to be serviced, stored nor driven in near- and below-freezing temperatures, through snow or on ice.g-Force Rival tires feature a Silica-infused compound molded into asymmetric tread designs that are performance-tuned to match tire width (265mm and narrower sizes feature a 3-rib design, while 275mm and wider sizes use a 4-rib pattern). Large, solid outboard tread blocks and BFGoodrich's Extreme Tread Edge (ETE) shoulder design wraps the tread compound farther down the sidewalls for predictable feedback and maximum cornering grip from start to finish. Lateral groove draft angles promote consistent performance and wear, while chamfered block edges resist feathering under extreme cornering and braking.The tire's internal structure features BFGoodrich's Performance Racing Core reinforced internal structure that reduces flex to increase steering response. The tread is stabilized by twin steel belts and an Equal TEnsion Containment System (ETEC System) of spirally wrapped nylon to optimize the tire's contact patch and traction at speed. g-Control sidewall inserts tune the sidewall stiffening to promote steering response. Related Information: The g-Force Family Control Manual (PDF)