BFG ko2 on stock 20 inch rim

There is so much info out there and hope someone has my set up to determine best BFG tire size. I have a 18 tundra with stock 20 inch rims and a 1.75 inch rough country leveling kit on the front. What is the best BFG tire size I can use with this set up. Will a 285/60 work? Sincerely thanks for any advise!

 

I recall seeing on the rough country site that you can do 285 65, maybe even 70 with that kit.

I been thinking about the 1.75" kit myself though I dont know if I would go 285 since they are more expensive than the 275. Plus the mpg hit.

 

I saw a set of 285/60 on a gmc A/T and they looked dang good! Not sure about the diff in a 275 and 285 on gas mileage? I wonder if the rim width is the same on the 20 inch tundra rim and the 20 inch GMC A/T rim?

 

My dude, you gotta read/ask in the wheels sub forum. Tons of help. https://www.tundras.com/forums/wheels-tires.18/