285/65/18s may be a little too big to fit w/o rubbing, unless you give your suspensions a lift. If you mean 265/65/18 (BFG T/A KO is available in that size), those should fit with minimal rubbing except under full compression or steering lock. I have no experience with BF Goodrich tires - I hear they are very good although not as good as they used to be... - but am very happy with Cooper Zeon LTZs (sized 285/60/18) on my RRS, they are plenty good on just about any off road terrain - except mud and ice - and very comfortable, competent and quiet on road. They are my everyday tires and I am on my second set, the first one lasted me about 50,000 miles. There was still plenty of tread left but they didn't have the bite of new ones off-road anymore. Not sure if Coopers are available in Norway, though. Also consider the Nitto Terra Grappler (285/60/18), which you can have in regular or E-load rating. These are all all-terrains, nothing too radical and aggressive, but that makes them suitable for use on the road as well. Keep us posted on your pick!