Ok I'm a complete noob when it comes to cars and I was just wondering what exactly the numbers mean when talking about tire sizes I.E. 275/30/18. Now I figure that the last number is the rim size they work with, but I'm confused on what the first two numbers mean.
Black 2012 Mustang GT 6MT mods: Borla S-type cat backs, 15% window tint, Raxiom Smoked headlights, Pioneer 8400, scosche dash kit, hertz speakers, JL Audio 500 watt amp, 2 JL audio 12" W3 subs. *more to come*