Here at Tire Rack, we are lucky to be within a short distance of one of the best race tire manufacturers in the country: Hoosier Racing Tire. It all began in the early 1950s when Robert Newton raced on small asphalt tracks around northern Indiana. Bob, was not satisfied with driving on street tires, so he decided to produce tires specifically designed for racing. Of the wide variety of tires that Hoosier offers, we have committed to stocking their two most popular models aimed at the needs of our customers who either autocross or roadrace: the A6 and R6.
Hoosier A6 tires are intended to be used at autocross events, as the tire has a lower operating temperature for maximum traction. Many autocross events are too short on time or distance to get a race tire up to its optimal temperature. This is why the A6 is perfect for these situations. The softer rubber compound that the A6 uses doesn't have enough durability to endure long run times (like in a track environment), so they should be used for shorter runs only.
R6 tires feature a more durable rubber compound that needs a little more time to come up to an ideal temperature range to be effective. This type of rubber compound makes the R6 better suited for longer runs with little cool down between sessions. For best results, Hoosier recommends a heat cycle of the compound at least 24 hours prior to use to maximize durability. Heat cycling is available for our customers when shipping from our Indiana or Nevada distribution centers for only $15 per tire.
Bear in mind, both the A6 and R6 radials are not intended to be driven in colder (below 40º F) temperatures, through snow or on ice. For best results, the tires also need to be stored indoors at temperatures maintained above 32º F. For more information on properly maintaining your Hoosier tires, read "Care and Feeding of the Hoosier A6/R6."