Thanks for your insights, Alex. If this helps at all, I have a screenshot of the 4 tires I'm thinking of buying. I'm eventually going to buy 265/75/16's after I do my 2" lift, in the meantime I need some tires to ride on as mine are a bit old and dry-rotted.

These are 245/75/16's from Craigslist:

 

To add to the advice above, it is highly inadvisable so don't do it even for a short run as the diff(s) may go 'bang' and cost you big time compared to any tire savings.

 

When i bought my D2 in fub the front tires looked to have a little more life in them then the rears, iv not had any problems.

 

Provided all the tires are approximately the same circumference and the recommended tire pressures there should be no problems. If one or two tires are 1" larger diameter (about 3" circumference or more) then there could be issues with the front or rear diffs or the centre diff if fitted. Hence this is the reason to rotate tires around to even out the wear.