Seemed straightforward-but-no so much. have had this truck maybe 3 or 5 years. has 7.5x16 on it now and the rims are only 5" I think. The tire guys wants me to buy new rims- I just want to replace the tires with some nice whitewalls. Ill drive it maybe a few hundred miles a year if that. should I go radial and if so what size- or are the dangers with bias tires really a big deal if I dont really work the truck- just drive around town?