I was wondering what is the biggest tire I could run on my 1986 pickup 2wd I put a add a leaf on the back and leveled it out in the front as well?

 

30x9.5 maybe? I run 31x10.5 on my 4x4 stock suspension w/ no rubbing!

 

its been so long that i forget what the stock size is but you will probably be able to get 2 sizes bigger than stock

 

You could always measure clearance around your existing tires to the wheel wells. Easy way to do that is to cut out a block of wood that is 1/2 the difference in height of your projected taller tires (compared to the ones you have now) and 1/2 the added width and then move that block over the surface of your tires and see what the clearance looks like. Try it at various angles of steering on the front tires and also with one front tire as fully stuffed into the wheel well as you can get it.

 

We had 205/75R15 BFG's on Sin91's 91 2wd for a while- they would rub if the wheel was full lock and you hit a bump. The rims aren't stock so they stuck out a little.

 

44 14.5 r24