Still running stock setup although I did buy a set of takeoffs so I can do the square setup when the need be. From my research and verifying it through members of this forum either the 275/35 or the 265/40 will work just fine in a square setup on Uber 9.5”. IMO the 265/40 looks a tad better likely due to filling in the wheel well gap, but the 275/35 is closer to the original tire height introducing less threat of issues with the cars systems. Falken has a new high performance all season tire that is considerably more affordable than the Michelins too with 265/40 currently available and 275/35 available later this year beginning in qtr 2.