Looking at the Toyo Rt trying to decide between the 35s and 37s going to be adding a leveling kit and keeping platinum 20s. Minor wheel well trimming wouldn't be an issue and have a aftermarket front bumper. Will they fit?
35's I'd say if you don't want rubbing issues.... I have 35.5x13R20 (325/60/R20) with a 3.5 level kit and I have issues with rubbing so I would stick to 35's....
That's what I based my comment on to stick with 35's. I go off-roading all of the time and I also have mud flaps on fender flares so 37's are definitely out of the question for me since there would be massive running issues. Driving down the Hwy without flares or mud flaps to fill the wheel wells and not articulating the suspension and I could see how people are getting away with 37's...
On just a leveled truck typically the swaybar and bumpstops won't allow it to articulate enough in the front to hit anything... Same with the bumpstops in the rear. I've had 3 different trucks leveled with 37s and never had issues.
I've seen 37" trail grapplers on a 350 srw that had a leveling kit. they were on there, but the majority of the inner fender liner had been cut and/or ripped away.