it gets worse the more you dig in. The middle number is am aspect ratio for length of sidewall. so its side wall thickness 35% of 245mm. Then on top of that whe

it gets worse the more you dig in. The middle number is am aspect ratio for length of sidewall. so its side wall thickness 35% of 245mm. Then on top of that when youre getting into trucks and jeeps common sizing switches to inches. so you go from 315/70/R18 to something like 35x12.5r18 complete shitshow.