I’m not sure I get the question.
255 is the standard width on all of them.
Long range gemini: 255-45-19
Long range induction: 255-40-20
Performance with pup: 255-35-21(front)
275-35-21 (rear). I confirmed the perf sizes today on my car, i was sure the rear is 30 but they are not, they are 35.
so your question, i wouldn’t go with 255-50-19, maybe it fits, maybe it rubs, I don’t see the reason to go oversized and throw off your speedometer.
Again not sure why you would want to use the 245-45-20 pr 255-45-20 unless you are using spare tires you have from another vehicle.
Going with a 20” correct diameter of 255-40-20, thats 28.03” wheel diameter.
For with your proposed 255-45-20 gives you a 29.03” wheel diameter, that will throw off your speedo for sure, I don’t see what the purpose of this would be, but maybe you have a good one.
The 255-45-19 gives exact same 28.03” wheel diameter.
the vehicle knows which wheels it has, I didn’t read the software to how involved it is when you put on dofferent wheels, but when I put winters on, I will chenge settings in software ap the car knows that 20” whees are on. The car reboots once you tell it you are on different size wheels.
I hope I answer the question, stick with spec’d size.
check this link out for exact info, especially if you look at wheels too, the offset and width of rim leaves very few wheel options that will fot nicely. Maybe 10-15, not 100’s,
The Tesla Model Y Wheel and Tire Guide. Complete Tesla Model Y Wheel Specs. - T Sportline - Tesla Model S, 3, X & Y Accessories