Hoosier A6 versus Goodyear Eagle RS AC Autocross Tire Test

Project STR enjoys the extra grip of autocross R-Compound tiresNow that we’ve tried all of the fastest ST-class tires, we thought it was time to really step up the grip. So we decided to test some super-grippy 245/40R17 Hoosier A6 and Goodyear Eagle RS AC autocross compound tires. And as fast as our vehicle has been able to go on the Hankook Ventus R-S3 ST tires, the fastest of the R-Compound tires is still a full two seconds faster. Talk about spoiling us. All this grip makes us feel invincible.

The unmounted stack of Goodyear tires is nearly a half tire taller than the Hoosiers. But once both sets are mounted on wheels, the tire stack height becomes equivalent. Interestingly, the Hoosier stack didn’t really change when we put them on the 17x9.0 TRMotorsports C3 wheels, but the Goodyears experienced some shrinkage.

Mounted on 17x9.0 Wheels
Full results will appear in the October issue of Grassroots Motorsports magazine, which hits newsstands in mid-August.

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