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Hoosier Racing Tires

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A7/R7

Hoosier Racing Tire Sports Car DOT Radial R7 tires are Racetrack & Autocross Only tires developed for drivers who compete in road racing where responsiveness and high levels of grip in hot, dry conditions are desirable. Radial R7 tires are designed to reward drivers with fast, consistent lap times and extended wear due to their traction and handling.

NOTE: Radial A7 tires are also used for road racing on lightweight cars or when competing in cool ambient temperatures where Hoosier Sports Car DOT Radial R7 tires cannot be brought up to favorable operating temperatures.

WARNING: DOT labeled Hoosier Racing Tires meet Department of Transportation requirements for marking and performance only and are NOT INTENDED FOR HIGHWAY USE. It is unsafe to operate any Hoosier Racing Tire, including DOT tires, on public roads. The prohibited use of Hoosier Racing Tires on public roadways may result in loss of traction, unexpected loss of vehicle control, or sudden loss of tire pressure, resulting in a vehicle crash and possible injury or death.

And like all Racetrack & Autocross Only tires, R7 Radials are not intended to be driven in near-freezing temperatures, through snow or on ice. It’s also essential these tires be stored indoors at temperatures maintained above 32 degrees F.

The tread compound of Sports Car DOT R7 Radials is molded into a slick tread design interrupted only by five-dash circumferentially oriented grooves alternating outboard and inboard. Beginning with a tread depth of 4/32", they will not require shaving for competition, however they will benefit from a minimal scuff-in prior to their first runs.

The tire’s internal structure features a symmetric construction that uses two lightweight steel belts reinforced by a spirally wrapped circumferential nylon cap ply under the tread on top of two nylon cord casing plies. It features a rim recess design on all sizes. Additionally, its symmetric tread design and internal construction allows the tire to be mounted on either side of the car (and later be remounted inside out to further extend its life).

H20

The Sports Car DOT Radial Wet H20 is Hoosier's Wet Racetrack & Autocross Only tire developed for drivers who participate in autocross and road racing events in moderate to heavy rain.

WARNING: DOT labeled Hoosier Racing Tires meet Department of Transportation requirements for marking and performance only and are NOT INTENDED FOR HIGHWAY USE. It is unsafe to operate any Hoosier Racing Tire, including DOT tires, on public roads. The prohibited use of Hoosier Racing Tires on public roadways may result in loss of traction, unexpected loss of vehicle control, or sudden loss of tire pressure, resulting in a vehicle crash and possible injury or death.

And like all Wet Racetrack & Autocross Only tires, Radial Wet H2O radials are not intended to be driven in near-freezing temperatures, through snow or on ice. It’s also essential these tires be stored indoors at temperatures maintained above 32 degrees F.

Sports Car DOT - Radial Wet H20 tires feature an aromatic oil-free wet weather tread compound that offers traction for fast and consistent lap times in wet track conditions, along with improved treadwear and durability in damp to drying track conditions. This compound is molded into a directional tread design featuring a combination of circumferential and "Y-shaped" 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.

Sports Car DOT - Radial Wet H20 tires have a symmetric internal construction and directional tread design that allow them to be mounted for use on either side of the car. The tire’s internal structure features a three-ply nylon cord radial casing reinforced by two fiberglass belts and a spirally wound circumferential nylon cap ply under the tread.

Hoosier Slicks come in 2 compounds R80 and R100

https://www.hoosiertire.com/rrtire.htm