Seems on-point. I figured out back of the napkin style that it's about 3.3-3.5 cents per mile for my i3 - NOT factoring in tire changes (which I have not done), as that is an absurdly high cost for OEM sizing.
When it comes time for tires, I'll happily take a small hit on efficiency to use a size costing 1/3 as much to replace them.
