You have "z rated" speed tires. T Z is the speed rating, the R means radial and the 17 means rim size. 245 is ur tread with in mm and 45 is the aspect ratio of ur side wall height to the tread with. (just incase you wanted to know what everything else ment
Originally Posted by PancakeOfDoom
so..., how would you know what your tires are good for?
i've got goodyear ZR17 Eagles 245/45, dunno what the rating is, so..., how do i figure that out?