@MountainPass They are 245/60/18s on Black Rhino 18x8.5 with a 35mm offset. The tires right now are Conti Vikingcontact 7s for the winter.
The place I got the wheels and tires had tried larger diameter tires on another Model Y and decided this was the largest you could do before rubbing or taking other drastic measures.
I just took it up a supper rutted out gravel road to do some mountain biking and it worked great!
That's such great news, I hope you have an awesome time with your lifted Y and have fun in the winter too.