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.
The tread compound of Sports Car DOT R7 Radials is moulded 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).