[3032]

What efficiency are you seeing on 18s?

In theory, the efficiency should be better than 19">20">21"

 

[3032]

A Pirelli tire engineer explained it very well better than I could. Hopefully he can help you understand it.

https://www.vwidtalk.com/threads/pirelli-how-does-wheel-size-condition-the-performance-of-your-car.14107/

 

[3032]

Like I said the main thing to me is ride comfort, now if I get more miles/kwh - that is just cherry on top. I honestly, don't understand why OEM have giant rims, not like we can see them from inside or we take our cars to the track. maybe my age but I want a laz-y-boy style comfort - one reason I like EV no engine noise, I don't even like the noise it make at sub 25mph speed but its for safety so that is fine.

Go with 18" wheels and 235/60 R18 tires. Consult @fiehlsport, the tire expert, to source the tires and wheels for you.

 

[3032]

I am reading that 20 inch wheels, driving at 50 mph will have an estimated range of over 400 miles. Really?
What am I missing?

I'm as baffled as you are.