As well as all that, you might also find the following embossed in the rubber tyre marking.The temperature rating - an indicator of how well the tyre withstands heat buildup. "A" is the highest ating; "C" is the lowest. The traction rating - an indicator of how well the tyre is capable of stopping on wet pavement. "AA" is the highest rating; "C" is the lowest. The tread-wear rating - a comparative rating for the useful life of the tyre's tread.