Quote:
Originally Posted by mystere485
245/45/18 to 255/45/18 changes the width not the height
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you really need to read up on the specs of tires. from above: 245 and 255 are the width of the tire(in mm). the 45 is the sidewall/width ratio (there is another word for it that is currently slipping my mind) that shows that the sidewall measurement is 45% of the width. if you narrow the width and keep the same ratio you change the sidewall measurement as well.
245mm x .45 = 110.25mm
255mm x .45 = 114.75mm
very slight difference, but still not the same height