After searching on the forum for three hours I still haven't found the answer to my question!

I want to upgrade from the 255/75R17 Goodyear Slient Armours (we don't get the BFG muddies on our Rubicon's here in Aust) to a 265/70R17 Mickey Thompson MTZ on my stock Rubicon rim.

Do I need a lift and/or wheel spacers or nothing???

Thanks!

 

The tire height would be 31.606" so I don't think a lift would be necessary. That tire is only a little wider so I don't think wheel spacers would be needed.
I'm far from an expert but I think I'm right.

 

If that is the case I am actually going smaller as I thought the original tyres were 32'. (Not what intended to do)

The next size up in these tyres are 33x12.5R17LT.

I believe that I do need spacers for this size but a lift?

 

Spacers would be needed for that size.

As far as a lift goes, some are running them without, some with a 3/4" front spacers, and others with 2-2.5" lifts. I guess it all comes down to how much off-roading you plan to do. I plan on running 33's eventually and pieced together a 1" lift using TeraFlex front and rear leveling spacers along with the Skyjacker 3/4" front spacers (which I all ready had) to level it out.

 

Well, even a tires that specifically states 32x11.50 will ultimately measure less than 32". No tire measure up to what is stated on the side walls and more times than not, they are significantly shorter.

Having said that, you could run 33's but I would recommend a 2" BB as you will get rubbing on the trail.