many ppl is asking about treadwear , traction and temperature on the side wall... actually this is their own manufacturer lab test postioning difference brand have their own calculation .... which means that if this A brand treadwear is 340 and that B brand is 240 most of those tyre shop ppl will say oh 340 is more tahan thean 240 lo.... answer is definetely NO ... just a ex: vw gti oem tyre potenza make in poland tread wear just about 140 only why millage can go more than 50k ??? and xm2 michelin some size tread wear is 420 also around 50k...