Wheel backspacing

[79 blue monster]

Im about to look for wheels, but dont know the maximum/minimum backspacing. I have a 5.5/7.5 drop, and im gonna be running 20in wheels in front and back. What is the maximum width i can go in the front, and what is the maximum width i can go in the back? And what back spacing do i use for each? I need help !!!!
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[79 blue monster]

anyone??????? i need help. what size are you running??? i ment to say OFFSET*****not backspacing.

[74 stepside]

Not too many people have lowered 3/4 ton trucks. But on a 1/2 ton the rear would be 5" back space on a 10" wheel. I believe the rear end is 66" wide on a 1/2 ton too. Measure the width of your rear and go from there. As I think the rear on yours might be wider than 66". Sorry I couldnt be more help.

[79 blue monster]

Originally Posted by 74 stepside

Not too many people have lowered 3/4 ton trucks. But on a 1/2 ton the rear would be 5" back space on a 10" wheel. I believe the rear end is 66" wide on a 1/2 ton too. Measure the width of your rear and go from there. As I think the rear on yours might be wider than 66". Sorry I couldnt be more help.

thanks, at least someone responded so that 5in backspacing, would be 0in offset right?

[Pro Performance]

The 1/2T trucks use a 5" to 5.5" rear backspace on a 10" wheels, and the front 1 5.25" backspace on a 8.5" wheel. I would measure like 74 stepside said, and go from there. You can adjust as needed if your rearend is a little different.

Might be hard to find a "off the shelf" wheel in 8-lug that will have the backspacing or staggered backspacing for a lowered truck. Might have to look into a custom built wheel.

[lolife99]

You can run a 20x8 with a 5" BS up front.
(or 20x8.5 with a 5.25"-5.5" BS)
These are 1/2 ton numbers.

I know you want absolute answers,... but I don't have them for 3/4 ton trucks.
You need to measure your truck yourself.
Too much money involved to make a mistake.

You will also need to remove your front inner fenders or modify them.
Look at some of the other build threads and ask the members with the trucks you like.

Read this to learn how to measure for wheels.
http://www.carcraft.com/techarticles...t/viewall.html

[J Knight]

An easy way to find out what backspace you need is to take a wheel off and support the axle/control arm at ride hieght, tape one string with weight on it to the fender lip, one on the inner fender, and one on the hub where the backside of the wheel makes contact. The strigs will give you plum line to measure from. Hope this makes sence.

[79 blue monster]

ok thanks guys! im going to go measure right now.