754M wheels on G70 i7 xDrive60 with M-Sport Brakes

[AventurinG26]

We’ve got an i760x with M-Sport brakes. It came on the 20” staggered wheels with 255/285mm tires. I found a set of 754M wheels from an X7 M50 that are cheap and in great condition. They’re 9.5” wide and originally came with 285mm wide tires. I was thinking about going to a square setup on the i7 with 275mm tires front and rear or 265mm if the 275 won’t fit the front. Does anyone know what the widest front tire that will fit is? The exact tire size I was looking at is 275/35R21. This car eats through tires so fast that not being able to rotate diagonally is resulting in us buying a new set of tires every 6 months.