I have been cracking some numbers related to my new wheels and tires and it seems that 50% of your electric cars energy consumption comes from wheels and tires. So saving potential is huge.
It is not wise to put 255/45R19 tires to your family car if your goal is to maximize the range. I have already proven that there is easily 10% savings potential in Model Y, but more accurate estimation suggest 12-15% savings when everything is done rigth.
Some manufacturers are running wiser tire sizes than others. but there is more to this than just tire size as aerodynamics are so important. I have seen good trends like in BMW IX1 205/65R17 size when taking measurements, also 205/55R19 from goodyear used in Renault looked very aerodynamic, but those I havent yet measured.
My plan is to prove you can have good driving characteristics even with tall and narrow tires.