Slick 60's

Im looking to find what backspacing I will need to use to fit a 255/80/15 or something close to that on the back of my truck when I lower it. So far Ive only found one guy running that tire on a lowered truck but he doesnt know his backspacing.

My plan will be to go spring under axle for the back and run that tire on a 15x8. Since my search for 15x8s have not been so good, and im not spending almost 250 on a set of steel wheels from wheel vintiques im going to make a set with stuff I have laying around.

I dont plan on tubbing the wheel wells, but I would consider rolling the lips if I have too. I want to run the deepest lipped steel wheel that I can. Thanks for any input guys!

i'm thinking 3.5 for sure and possibly 4.0. i had a 275/60-17 on a lowered 68 and i'm thinking those wheels had 4.0" of backspace. i did have some scrubbing of the paint on the inner fender, but it was minimal.

So with 4 inches a 255 70 should be fine then I'm guessing.

My truck came with 15x8's 4" back space 225 70 15's all was well.

275x60x15 on 15x8 American Racing Rodmasters,
lowered ALOT, lol. I seem to remember the spacing at 4".

I also have a little rubbing on the wheelhouses, nothing a 1/4" billet spacer won't fix.

Thanks when I lower mine it will be spring under axle and blocks untill it sits level with the front.

Ill make mine with 4 inches of backspacing

I have 275/55 17" and my backspacing is 3.5" Fits well. 4" would probably fit, although I have load assist airbags that would interfear with 4" backspacing.

My 15's I used to have were 15x8 with 3.75" backspacing and a 275x60 tire. It fit very well.

Yea but I plan on having mine low. Spring under axle and then a one inch block.

I've only seen one that is that low with 255 70s on a 15x8, but he doesn't know his backspacing.

I flipped the rear axle and c-notched the frame, I only have around 2~1/2" from the center section of the rear end to the bottom of the bed floor. One thing I didn't think about was removing and installing the tires/wheels. I have to undo the shocks to get the rear end dropped far enough. I used 18x9.5" -4mm offset, 5.031 in. backspace with 275/40/18 tires.

I love those BOSS 338 wheels. I wanted them on mine but had to go with deeper backspacing due to the wider axle stance. Do you have a full side picture of the blue truck? Would love to see how it looks. I went with narrower, taller tire to keep some of the classic look, but yours looks great! Show us the rest of it!

Here you go, no pics of the completed truck yet but it's close in this one