What is the biggest tire size that I can put on without a lift or rubbing? I have a 2001 supercrew 4x4 w/ 255-75-16 (I think).

 

33" with no suspension mods, or 34-35" if you crank the torsion bar and trim some plastic in the wheel well. Mine work out to 32.7" and you can click on my WWW to see them. For the stock 16" rim, I believe some people have fit 315/75R16 tires on them.

 

i PUT 315/70/17 BFG AT'S ON MY 02 SCREW FX4 WITH A LITTLE TRIMMING ON THE AIR DAM AND THE REAR INNER FENDERS ON THE BACK BOTTOM.

 

I put Firestone 265 /75/16 M/T on my 98. they mesure 31.9" dia. no rubbing but getting close.

 

i have 287/75R16 on mine no problem they work out to be 32.8 dia

 

I have 275/70/17 Goodyear ats lt specs out 33.1 inches tall. 2000 f150 supercab off road. Got 25000 miles, look new. Last fall, i went to Colorado, no problems in snow but not great in the mud.

 

275/70R17 = 32.1"

 

285/75/16

 

You can run a 285/75-16 (33x11.50) or a 305/70-16 (33x12.50) on stock 4x4. If you plan on keeping your stock 16x7 inch rims, I'd go with the 285's. If you think you may purchase some 8 or 10 inch wide aftermarket rims later on, I'd go with the 305's. Both will work with the stock rims, but the 305's are a little too wide and this will make the center portion of the tread wear a little faster.