Bigguns!
There looks to be a few available tire sizes that could be made to work on that rim. Depending on how aggressive you want to go. Looks like all these sizes can be found in Toyo AT3s which I highly recommend.
1) 33X12.5R22 - 32.5" x 12.5"
2) 285/50R22 - 33.3" x 11.7"
3) 295/50R22 = 33.7" x 12.2"
The first one would probably drop right in without any work at all. They would be very similar to the Rock Warrior 285/70R17 fitment that uses the same optimal offset. And the LX handles width without a problem.
#2 could be made to work with relatively minor effort tucking and trimming some fender liner plastics. Recommend pairing with a .75" spacer. Less than the work I needed for wider 33.2 x 12.3" tires here
I'm getting ready to have my 305/55/20's (33.2"x12.5") mounted tomorrow. I know there will be just a tad of kissing of the tires to wheel well liners at the front deflector and trailing mud flap. Wanted to see pics of what you guys have done. As a reference, I will be using my stock 20" LX570...
forum.ih8mud.com
#3 can definitely work too depending on how much effort you'd like to put in. Recommend 1" spacer here. Refer to link for potential additional modifications, but wouldn't really need this much
Join along as I work through making the necessary clearance mods for 35x12.5R20s tires on my LX. These Toyo AT3s spec out to be 34.5" x 12.5". If you have any suggestions, I'm interested in hearing. Note that this fitment is specific to the LX as it's easier to fit larger and wider tires...
forum.ih8mud.com