Originally Posted by muskrat
Thought they were W ?
OK, I think maybe I'm getting confused by the Z in "ZR"? The book of words says:
Sport Performance (Y speed rating) tires and All-Season Performance (W speed rating) tires
Front 225/40 ZR18
Rear 255/35 ZR19
So actually, the speed rating choice is between Y and W? What do most people use?