I had the same dilemma as the dealer here in Adelaide stated that any deviation from factory size (275/40/20) fitted to my car(2013 SD 3.0 litre) would void my warranty. After some considerable research I imported a set (5) of General Grabber AT's in that size from the UK. As yet untested off road so I cannot comment on their performance but in terms of general driving I have to say that they are proving to be quite satisfactory

