I have an 06 F250 KR FX4 and its time for new tires. I have aftermarket 20's w/ 275/65/20 now. Will 37's fit? 37/12.50/20 or does someone have a better suggestion? I would like to go bigger than my current size.
Thanks

 

You can do a 35x12.5x20, but I'd recommend a leveling kit (2.5" spacers up front and F350 blocks in the rear).

You're not gonna fit 37's under there. That's a pretty large jump up from a 35". Not just a 2" jump either...

 

37s will require major trimming to clear. I ran 35s with a leveling kit and custom front bumper and they cleared. I always wanted to run 37s but couldn't get myself to cut the rear of the front fender opening.

 

Yea you really need at least a 4" lift and you will still need to do some trimming to clear 37"

 

My buddy ran a 4" lift on his F350, with a 2.5" leveling kit in the front on top of the lift and they still rubbed 37x12.5x17's on 17x9 wheels.