You will have to beat the firewall back to fit anything bigger than 32" tires. I put on 33" and 3" body lift and had to beat where the firewall meets the floor board back about 1", plus I had to cut out 2" wide pie wedge front and back of each fender well. I ran Firebird rims and still rubbed the frame before full crank of the steering wheel, in both directions.

 

My 2000 ZR2 came with 31/10.5/15's on it.

 

ZR2s have a lifted suspension compared to regular Blazers though, so of course you can run a taller tire compared to a stock regular 4X4 Blazer.

 

Im almost done with installing my 2" shackle lift and T-bar keys. I have a set of BF Goodrich 31x10.5 that i wanna put on but im getting mixed reviews as for my rims. I have 15x7 94 blazer rims on my truck. Will the tires fit and function properly? I have people tell me ill have no probs and I have others tell me ill have too much roll over. I have 30x9.5 on it right now and not much rollover.

 

and that is the stock tire size on ZR2's.
of coarse they will fit on the stock truck.

 

Man, for me to fit 31's, i had to do the shackle lift and the t-bar crank +
a 2" body lift, and still trim the front and rear fender openings, Iam guessing it have to do with the trim options on the different vehicles and spring options+ age, but i still love my money pit though, GM the most expensive vehicle i have ever owned .
Robert

 

Or (very probable) your torsion bars were sagging, so the torsion bar lift didn't give you the full lift described here.

 

Your z85 package is a little taller than a stocker with out it I do believe

 

I have 32x11.5x15 BFG all terrain T/A's on my 2000 ZR2

 

Thats because you have a zr2! Did you have a point to this post?