I just swapped over from my R series 17" setup to a 15x8 with the 275/60/15 Radial Pro (not the R - series). I drive on streets to the track now and swap out there. Yip, like a regular old tight wad, I throw the tires, jack, cordless impact, torque wrench, portable air compressor, and associated hardware into the car and head to the track. Swap out, race, swap back and drive home now. I'll make the drive on them in the True Street Class NMRA in June, but that drive is only 30ish miles and the road speeds don't exceed 45MPH I found. I know quite a few guys who have used this tire for that class. DOT is all they seem to care about. Same rubber compound as the Street legal R series BTW. Both are R2 compound on the MT Compound specs. Just notches. Oh tread depth new is 4/32's. I measured out of curiosity.