Wheel and tire setup

New to the group. I have a 2016 Tundra SR5 2wd with a dealer installed 2 inch leveling kit. I'm trying to figure out how wide of a rim I can run on this setup. The dealer told me I can run 33s with the leveling kit but I'd have to remove the front mudflap in front of the front tires to prevent rubbing. So if I run a 33 can I go with a 20x12 and still have little to no rubbing? What offset would I have to look for when deciding on rims for this setup? Thanks ahead of time.

 

https://www.tundras.com/threads/official-tundra-wheel-and-tire-setups-pics-and-info.95/

For the record, a 20x12 is pretty wide, most on this forum stick with a 9 inch rim with 18-35 offset and little to no cutting depending on size tire.

I'd say the dealer is pretty much right on 33's on a 20x12 rim. Wouldn't give you much sidewall though.