New year, new tire supplier.
For 2025, Hoosier Racing Tire will replace Toyo as the tire supplier for several NASA classes: 944 Spec, American Iron, Camaro-Mustang Challenge, Spec Iron and Spec E46. The spec tire will be the RCES, a DOT-approved tire with a 4.5/32-inch tread depth.
Accordi…
And just to be clear, Toyo has not been fully replaced in NASA spec classes by the Hoosier RCES, just those listed in the story.
Spec Z, Honda Challenge and Spec3 will all run on the new Toyo Proxes R, while Spec Miata will continue to compete on the older Proxes RR. The latter will continue to be made in the necessary 205/50-15 size for at least one more year.
Watch GRM for an upcoming testing story involving both versions of the Toyo
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