Hoosier Tires

Hoosier Racing Tire Sports Car D.O.T. A6 Radials are Track & Competition DOT tires developed for drivers who compete in autocross, time trial and hillclimb events in dry conditions where providing responsiveness and high levels of grip at lower operating temperatures is desirable. The A6 Radials are designed to give the driver significant performance advantages over previous A3S05 tires in autocross competition.

The A6 Radials feature an improved tread compound molded into a "slick" tread design featuring two symmetric "Formula One" style circumferential tread grooves. A more rounded tread profile extends the life of the shoulders and produces more consistent tread wear across the entire contact patch. The A6 radials feature a revised symmetric internal construction that uses nylon cord radial carcass plies reinforced by two lightweight steel belts and a spirally wrapped circumferential nylon cap ply under the tread. The tires feature a "rim recess" design on all sizes.

Hoosier Racing Tire's extensive testing has shown the A6 Radials produce crisper steering response and improved transitional performance. Their improved tread compound delivers more consistent run times over longer exposure to heat and less degradation of grip after several runs. Their new internal construction provides increased overall grip and greater stability at the tire's higher limits of adhesion, allowing the driver to apply more power with confidence. The new A6 Radial has also shown better overall wear due to the improved tread profile and the increase in overall grip. Additionally, their symmetric tread design allows them to be mounted on either side of the car (and later be remounted inside out to further extend their life).

Hoosier Racing Tire's testing has also shown performance will be improved by using lower operating pressures compared to A3S05 tires. Hoosier advises competitors to lower air pressures in small increments to find optimum air pressure for their specific vehicle.

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Hoosier Racing Tire Sports Car D.O.T. R6 Radials are Track & Competition DOT tires developed for drivers who compete in road racing where responsiveness and high levels of grip in dry conditions is desirable. The R6 Radials are designed to provide performance advantages over previous R3S05 tires by rewarding drivers with faster, consistent lap times and extended wear due to the improved traction and handling.

While the R6 Radials use the same successful tread compound as the R3S05 tires, it is molded onto a more rounded tread profile that extends the life of the shoulders and produces more consistent tread wear across the entire contact patch. The R6 radials feature a revised symmetric internal construction (shared with Sports Car D.O.T. A6 Radials) that uses nylon cord radial carcass plies reinforced by two lightweight steel belts and a spirally wrapped circumferential nylon cap ply under the tread. The tires feature a "rim recess" design on all sizes.

Hoosier Racing Tire's extensive testing has shown the R6 Radials produce crisper steering response and improved transitional performance. Their new internal construction provides increased overall grip and greater stability at the tire's higher limits of adhesion, allowing the driver to apply more power with confidence. The new R6 Radial has also shown better overall wear due to the improved tread profile and the increase in overall grip. Additionally, their symmetric tread design allows them to be mounted on either side of the car (and later be remounted inside out to further extend their life).

Hoosier Racing Tire's testing has also shown performance will be improved by using lower operating pressures compared to R3S05 tires. Hoosier advises competitors lower air pressures in small increments to find optimum air pressure for their specific vehicle.

Beginning with a tread depth of 4.5/32", they will not require shaving for competition, however they will benefit from heat cycling before competition to enhance wear and provide more consistent performance.

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Hoosier Sports Car D.O.T. Radial Wet tires were developed for drivers who participate in autocross and road racing events in moderate to heavy rain. While all Hoosier Sports Car D.O.T. Radial Wet tires have passed DOT requirements, they feature a special tread compound to facilitate racing in wet conditions. Due to this special compound, these tires are not suitable for highway use as the expected miles of wear is greatly reduced.

On the outside, the Sports Car D.O.T. Radial Wet tire features a tread compound proven during years of Motorola/Grand-Am Cup endurance racing. This wet weather compound is molded into a directional tread design and features unique "Y-shaped" major circumferential and lateral tread grooves. Through the initial portion of their life (between their beginning tread depth of 8/32-inch and approximately 4/32-inch of remaining tread depth), the walls of the tread grooves taper as the tires wear. Through the remainder of their tread depth (between 4/32-inch tread depth and worn out), the walls are molded vertically. This allows the tires to serve as full wet tires when used at their original 8/32-inch tread depth, or intermediate wet tires when shaved or worn to approximately 4/32-inch of remaining tread depth due to the reduced tread squirm and increased footprint contact area.

The Sports Car D.O.T. Radial Wet tires have a symmetric internal construction and directional tread design that allow them to be mounted for use on either side of the car. They feature a three-ply nylon cord radial carcass reinforced by two fiberglass belts and a spirally wound circumferential nylon cap ply under the tread.

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