Here are pics my new 255/70/15 Firestone Firehawk Indy 500 tires mounted on stock 15" x 8" steel rally rims. The truck is basically stock: 305H engine, 700 R4 transmission, rear end, ride height, exterior paint (steel gray) and interior. As you can see, the tires fit perfectly (thanks Slonaker for the advice and recommendations) and if I wanted to lower the truck, no problem. Additionally, if you want to check proper tire sizing, I found the following Web site on Tirerack.com extremely helpful. You can do a comparison with your stock tires versus various sizing -- tire diameter, tire height, speedometer readings and more. Check it out at
http://www.discounttire.com/dtcs/infoTireMath.dos
What do you guys think?