37" on a Icon leveling kit here. Trick is to get your offset right.
You want em sticking out ghetto fabulous w/ a bunch of offset then you need a big lift.
Mine are right even with the flairs and I get just a touch of rub on the mudflaps.
These are Ridge Grapplers in 37x12.5x22. My wheels are 22x10 w/ a -10 offset. Sticking way out is usually in the -40 range.
I want to put the 37x13.5x22 on there when I put new tires on, but I think I have to push the whole front end forward a smidge w/ a 3link kit. 13.5s also mean I can't fit it in the carwash anymore

Probably going to cost me a bunch of mpg too.
Still want them
