Question!!!!

I'm running the Toyo 325/60/20 and want to program the SCT xcal2 tuner. Now I have to set the tires revs/mile. Can you please give me the answer to wat I have to set it?

Also tried the extreme street program and the car looks like a rocket.... I'm afraid this will do damage to the tranny.. Any advise if it's save to drive it in this program? I do not have an EGT.

Thanks...