Anybody have any idea what the factory rim offset is for a 1985 F150 2WD? I am going to be getting new rims and I want to compare offset so I can figure out what size tire I can fit. My front coils are pretty tired so I am going to be upgrading to the 1.5inch rough country leveling coil springs. The new rims I want to get are 18" with a +18mm offset. Think I would be able to fit 33s with this setup? I know people have fit 33s before but I don't know what offset they are running. Any help is appreciated!

 

Factory wheels have zero offset which means the 8" version has 4" backspacing, the 7.5" wheel has 3.75" backspacing, and the 7" wheel has 3.5" backspacing.
To retain clearance at the radius arms, at steering "lock to lock", you'll want to use no more than 4" backspacing and maybe even a little less which means the 10" wheel you'll need for those 33's will have to be ( -1" to -1.5" ) offset.

 

Okay this is good to know. I may have to pick out a different rim with an offset closer to zero. I'm not dead set on the 33s yet. It was just a thought. The level kit recommends 32x11.5 size which I assume would be on a factory rim.