running that kind of offset will put tremendous stress on the ball joints and bearings. Why are you running a 3.5" flare?

if you want to get close run a 15x10 rim and some Toyo MT's in a 35x13.50 tire. have the rims with a 3.5" offset. I think any more and you will have issues with the tires hitting something.

 

I'm running 37x12.50x16s on 4" BS 10" wheels. I have around 2 inches of flare sticking past the tire. Flares are bushwacker cutouts, at 4-5" wide. Offset is a byproduct of wheel width and backspace, with the wheel mounting surface thickness taken into account.

 

The 15x10 have the perfect back spacing of 3.5" on the Level Springs, I get no rub whatsoever on the KM2 33x12.5 Get the 15x10, you won't regret it. I have a Pic in my sig

 

Agree, a 12" wide tire will not fit correctly on an 8" wheel. The tires will balloon out, and look and ride like so, with decreased tread life and increased noise.

If you're in my area, I've got a set of mounted dry rotted 15 year old 36x13x15 swampers we could try on it on 15×10 wheels.

 

Okay thank you all, I'm still new to this so I'm trying to figure it all out. I put a pic of the truck as my avatar. I also typed it wrong earlier and was mistaken, I have 2 inches of flare that stick out past the tire, not 3.5. I will end up going with a set of 15x10 so that when I bump up to the 35's they don't balloon out. So to be fair, a 15x10 with around 3.5 inches of backspace would be the best option?

 

So to be fair, a 15x10 with around 3.5 inches of backspace would be the best option?

Yep, you got it man. :toothless

 

A 12.5" wide tire will fit perfectly fine on a 8" wide wheel. No ballooning, increased tread wear, or noise. In fact if you plan on airing down a 8" wide wheel is better because it holds the bead better. Ive been running a 8" wide wheel with 35's for 6 years and no issues and I've never popped a bead. I'll be stepping up to 37's and bead locks soon with a 8" wide wheel.

 

i also run a 12.5 wide tire on 8" wide wheels. I offroad and air down often so the narrower wheel helps keep tire on the bead.

I only buy my tires from discount tire so i am surprised they said this to you about the wheels. it might be recommended but not necessary.

 

Its a liability issue, tire manufacturers will only recommend a certain width range of wheel for certain width tires. They may work but the manufacturer does intend them to be mounted on a too narrow or too wide rim. Actually believe it or not mounting too wide of a tire on a narrow rim or to narrow of a tire on a wide rim puts stress in the sidewalls that they weren't designed for, also to get a tire warrantied if there is a defect also often requires the tire to have been mounted on an appropriate width rim suggested by the tire manufacturer. Tire companies and shops are starting to crack down on the regulations. Even here at work we have had to make some changes to what was normally not a issue. The main thing now a days is people suing even if their reason for suing was bought on by themselves. A good rule of thumb is to have wheels as wide as your tread width (different from the advertised width which is from sidewall to sidewall)

 

If you run a 12.5 on an 8" rim, you might have rubbing issues as opposed to running a 10"

 

rubbing will occur with either width wheel. the backspacing of that wheel will have an impact on wether it rubs.

 

I disagree. In my experience, running 10" wide wheels w/12.5" wide tires eliminates rubbing as 10" wide wheels generally have the right backspacing for clearance on most Bronco's w/out modified suspension. I prefer to run the 12.5" on 10" wide wheels but I know many insist on running 12.5" on 8". :shrug

That said... the OP originally wanted tires to set out even further (even with edge of fender flare). I don't think he's going to achieve that with a 12.5" wide tire or 10" wide wheel w/out wheel spacers and the potential problems they bring with them. Wider wheels and tires are available but are usually much larger (37"+), afaik.


33/12.5/15's (GYWD) on 15x10 wagon wheels on '90 FSB with no rubbing problems, no lift and no fender flares:

33/12.5/15's (SSR) on 15x10 wheels on '78 FSB with no rubbing problems, no lift and no fender flares:

 

33/12.5/15's (SSR) on 15x10 wheels on '78 FSB with no rubbing problems, no lift and no fender flares:

Those are some slick wheels pepe, what are they?

OP could always get 12" wide wheels and run a 15" wide tire...

Or go balls out and run a set of these little 36's (The tire next to the truck). They are only 20" wide

 

Thanks everyone, I'll end up getting a nice set of rims eventually and just settle with wherever the tires end up safely. Cant really go wrong with a bronco! :upup:

 

I have 3" of lift and 285/70/17's on 17x9's. Stock front bumper with the air dam still installed. Bumper is spaced 3/4" forward and slots are cut to raise it up a bit but I don't have any rubbing