Wheel & Tire Sizing on 68 F100 2wd

[benm78]

Anyone aware of a good way to determine wheel & tire sizing lmits for a 68 F100?

I'm sure that variables like offset and backspacing would play into the equation, just not sure where to start.  I know I'd like large wheels, perhaps 19-20" diameter, low profile tires to wrap them with.  Thinking about dream beams and shackles/hangers as well.

Don't want a low rider, just more of a street stance.

Thanks..

[FORDification]

Here's some articles to get you started:

http://www.carcraft.com/techarticles/3636/
http://www.rsracing.com/tech-wheel.html
http://www.earlywheel.com/choosing.html
http://www.chevyhiperformance.com/techarticles/72978/

[benm78]

great links, thanks!!

[benm78]

For the records......

20 x 10 is not the best idea.....even with perfect backspacing all around, 20 x 9, 19 x 10 or even 19 x 9 would have been better for my particular application.  I bought the 20 x 10s, 3" backspace for rears and 4.5" backspace for fronts.  When the rear squats REALLY low, like a couple of yards of mulch, the tire sidewall just barely contacts the aluminum wheel well mouldings.  The contact is so minimal that the only damage was a thin scribed mark where the aluminum "scratched" the tire shine off the sidewall.  Either way, 3.25" of backspacing would have worked better for the rears.

For the fronts, 20x10 again fills the wheel well nice with the stock stance, but my desire to go lower will clearly not become reality because the outer edge of the tire will certainly contact the same aluminum wheel well moulding, when turning the wheels.  Also, I am very nervous that the disc conversion may push out the front stance a bit and cause a clearance issue when turning at higher speed (body roll) or when hitting bumps while turning.

Unfortunately, after hours and hours of checking on what tires would work and give the right low-profile look, I was sort of forced into the 10" wide wheels and using them on all 4 corners, simply because I wasn't willing to have a significantly different tire height between front and rear and when comparing what was available within the same brand/model of tire for two different rim widths I was unable to find anything that wasn't going to rake the truck too much, closest I could get was about 1.5" height difference front to rear....

Tires I looked at were BFG G-Force KDW and General Grabber UHPs, I went for the Generals because of the sidewall styling.

Perhaps these days (since the study I did was 4 years ago) the tire MFGers offer a better line up of 20" tires.....

Case closed.