35s on level
#16
I just had some 285/65/20 BFG's put on today with the stock 20 rims. I had them test fit yesterday on one wheel, and it rubbed the plastic inside the wheel well on full lock, however, when installed today on all four, no rubbing whatsoever. I still cut it just to be sure going forward. These amount to about 35x11.5. I love them already and will post some pics shortly. So if these are a way to have 35s if you choose. Not as wide as you may like, and mine aren't mud, just at's.
#17
A 8 inch wide wheel with 5.5 or 6 inches of backspacing or an 8.5 inch wide wheel with 6 inches of backspacing should do the trick. For reference, the OEM wheels are 20x8.5 with 6.5 inches of BS. The problem with the OEM wheels is that the 6.5 inches of BS pulls a 12.50 inch wide tire inward so far that some of them touch the upper control arm/ball joint.
#20
When I trimmed I had to get right up against the metal. There was no metal that got trimmed. I had to trim the bottom of the stock flare and the plastic liner. Also with the spacers/ adapters I got them from tlt008 and they are to notch. He had them special made and I can honestly say that there are no vibration issues at all. If you go this route just be sure to make sure they are hub-centric though. That is what counts.
#21
Look's like the factory 20's are a lot trickier to run 35x12.5's on then the factory 17 or 18" wheel's. Like Wandell said the backspacing is the problem and the MT's are harder to fit then the AT's. A mud terrain tire is a good bit larger then it's all terrain brother even though they are the same advertised size. This causes an additional problem with clearance.