I have a few different sets of Limited 20s and have tried lots of different tires.
I have owned like 6 sets of the Limited 20s and probably put 300,000+ miles on them across a few vehicles.
I have owned
285-55-20 BFG AT
275-55-20 General AT/X
305-50-20 General AT/X
I owned 2 sets of the BFG AT, wore one set out and sold the second set when i switched to the 305-50-20 Generals.
I have owned 4 sets of the 305-50-20 Generals
I have owned 1 set of the 275-55-20 Generals.
When running a wider tire on the narrow rim, you must MUST run lower air pressure to get the tire to widen out. I check the tires by driving on a white gravel road, and then on pavement and checking to see how much the white dust it wiped off the tire and change pressure to allow the full contact patch of the tire to touch the road and wipe the white dust off the tread.
I am usually around 22-24psi up front, and 18-20psi in the rear running the 305-50-20. Sure this sounds wild, sure this is below everyones typical operating pressure, but it works and it rides like a dream and the tires wear forever.
I have 26psi up front, and 20psi in the rear on the 275-55-20 Generals to get them to flatten out. I have never had a tire failure, bead failure, puncture, flat, or any tire related issue with the tires, wheels, or pressures i run.
Use the tire size calculator and compare your known size out to whatever it is you want to run and see how close they compare. I have run the 305-50-20 on my tacoma, tundra, and two different 4runners. I switched to the 275-55-20 on the tundra because the 305-50-20 rubbed the upper A-arm too bad and was cutting the side of the tire. I have a set of the 305-50-20 on my current 5th gen 4R and absolutely love them. My 4th gen has a set of the 265-60-18 on the limited wheels and i have 96,000 miles on the General AT/X on it and still have tread left. I absolutely love these tires.
Tire Size Comparison