People tend to forget that every brand is differrent and not all 255 fit the same. Ive had 255s on a 9.5 rim that poked a bit and then 265s on the same rim that was hella streched. Just look for pictures online of the specific tire brand you want on the same size rim you have. Also some tires have lip protectors or narrow sidewalls which only makes them look more strectched and just ugly as hell.