Originally Posted by HawtPants
205/45zr16
205 tire width touching the ground
45 bigger number usually means smaller sidewall
16 rim size
i think....
Negative. Smaller number means smaller sidewall. It's the aspect ratio.
Say your tire is 205mm wide, the sidewall is 45% the width of the tire. This is why 205/45-17's will be thinner sidewalled than 215/45-17's.