Totally possible, but it won't have that stance without the lift.
The thread right beneath yours shows a few people who are using the 275/65-18 Duratracs, with no rubbing issues. That is definitely the largest you can go with that tire and 18" wheel, without using spacers or a dedicated lift/no air suspension.
Duratracs and Mopar offroad wheels on a 2014
and so you know the setup of the Mopar off-road concept vehicle you posted, it's using:
- 255/75-17 BFG KMs = 32" tire (almost exactly the same as the 275/65-18 Duratrac, but the KMs are narrower)
- 1.25" spacers
- and a dedicated lift