Quote Originally Posted by 99jdmLs
195 is the widest point of the tire's outer sidewall to the widest point of the inner sidewall

50 is the tire's sidewall height from rim to tread.


15 is as you know, size of the rim

depending on the rim you could use a 205/50/15, as that is what is on my si. it's a little wider and going from a 195 to a 205 i noticed a difference in corners, could also be that i went from an ok set of tires to some yokohama's.