1998 GMC K1500 5.7L Z71 4x4 Max Tire Size?

[MROY16]

I have a 1998 GMC K1500 with a 5.7L, it is a Z71 Off-Road 4x4.

I am wondering 2 things:

1) What is the maximum tire size I can fit without trimming or rubbing on the stock height? 16 INCH RIMS AND 18 INCH RIMS

2) What is the maximum tire size I can fit without trimming or rubbing on a 2 inch lift? 16 INCH RIMS AND 18 INCH RIMS

Thanks in advance!!

 

[travis85]

I used to run a 285/75r16 with no problem. just had to turn up my torsion bars about an 1" to level out the truck. nice ride and looks really good.

 

[MROY16]

I picked up some 285/65R18 to put on my 18"x10" wheels, approximately 32.5"