18" wheels? Tire sizes?

[Slammed67]

Anyone here have 18" wheels on a lowered truck (fleetside)? I'm trying to figure out the best wheel/tires size combo. I've done some preliminary measurements and was thinking 18x9.5's in the rear with 5.25" backspacing with 285/40/18 tires. And 18x8's up front with 4.25" backspacing with 225/45/18 tires. For the rear I used my existing wheels/tires as a starting point. They are 15" wheels with 225/70/15's with 4.25" backspacing. I figured I can add an inch of tire to the inside and and 1.25" to the outside, which equals about a 285 tire, which is 11.22" wide. So maybe a 10" wide wheel would look better? For the fronts, I like the 4.25" backspacing, but want an 8" wide wheel. Any other suggestions?

------------------
Formerly know as: "GMC Under Construction" Current project: 1967 GMC shortbed/fleetside, 350/700R4, air bag suspension. Other vehicle of interest: 1957 Chevy Bel-Air 4dr hard top, 283/powerglide, lowered 3-1/2" in front and 2 inches in the rear.

Web Site: jaySpot.com AOL Screen Name: Slammed67GMC Location: Kansas City, MO