what's the largest rim and tire you can fit on a truck with a level kit? (xd rims and toyo mt tires) preferably

rims 28"'s i think and a 33" tire they make 30"s but i think you can only get 35 for them and that might rub. What looks nice would be 18"to 20"s and some 33"s May have to trim a little. BUt since you asked what the largest rim and tire i answerd. OH h2's and 315/70/17 have been also and look nice but it depends on what your going for.

so i could fit an 18 inch rim with 295 tire and it wouldn't rub when i turn?

Mine rubbed with 285's. I had to crank up the torrison bars. Once I added the lift I returned the torrison bars to stock settings.