I went to buy a set of tires today, at a local shop and met this interesting mechanic named Lee Roy, who acted like he knew everything there was to know about rubber, well I engaged in conversation with this one-of-kind hillbilly, who proceeded to tell me, through 8lbs of tobacco in his lip, that a set of 31-10.50's would run me 506 mounted and balanced so of course I wanted him to quote me the closest metric size to 31's that I could calculate in my mind at that time, (265/75/15) in order to compare the price. According to him same exact Brand (BFG's) and tread were 213 dollars cheaper!!, now by rough math there is only about 6 tenths of an inch in height difference and a couple of tenths in width, (correct me if I'm wrong). So mom did not raise a fool, my XJ is about to be fitted with 265's ....Corrections Please?? Stop me if I'm wrong.....