I like the idea of a square setup because the advantage of being able to rotate tires. I am running that exact setup. I have a set of 22” Unplugged 03 Super Light Forged Wheels. I have 265/35/22 Continental ExtremeContact DWS 06 all the way around. Great all around tire with great tread life and very light. Perhaps the only disadvantage is the load index on the 265s is 102 compared to 106 for the 285s, but Tesla does not recommend using 22” wheels in a towing configuration. I have thought about going to 275/35/22 for a little more sidewall width to protect my wheels from curb rash but the selection in that size is very limited and so the cost for those wheels is quite a bit more. Also I have a square setup for my winter wheels too. I drop down to a 20” x 9 rim and run 275/45/20 Michelin Latitude X-Ice Xi2 all the way around. Keep in mind that most winter tires are directional so you can only do front to back rotation.