20x12

[JBlanks]

I wanna put 20x12 in the rear of my 85 step side chevy,  so will the fit with out doing a bunch of stuff or will I have to do alot to it to make them fit?

[roundhouse]

I assume you're talking about the rim size ?

That would depend a lot on what size tire you use
And what backspace and offset the rims have

And only one way to find out ....

[JBlanks]

Yes sir rim size is what I'm talking about and I'm thinking of running a 315x35x20. And as far as back spacing that's kinda what I was hoping to do was find an answer.

[roundhouse]

Best way is find some tricks you like the wheels on and find out the specs of the rims and suspension mods

I assume your truck is lowered ?

[JBlanks]

Ok will do, it's lowered, I know it's had the helper leaf removed and 2 inch shackles and the previous owner heated the front coils, so I gotta get some springs and spindles to be able to get it lined up correctly.

[roundhouse]

Ok will do, it's lowered, I know it's had the helper leaf removed and 2 inch shackles and the previous owner heated the front coils, so I gotta get some springs and spindles to be able to get it lined up correctly.

I've seen a few at shows
And if you could find some online you might be able to contact the builder or owner and get details

Cheaper and faster than buying a bunch of Rims and tires and trying to figure out what fits and what hits

Might be able to go to a local shop that sells that style rims and tires
and pay em for their labor to mount up a few and test fit em

In some sketchy neighborhoods that are places that RENT rims and tires
   Might be a good place  to find out what fits 

[JBlanks]

Never thought about that lol