So my take on tires is a bit different: as the original Ecopias got damaged one by one, not worn out but got holes in them, I just started buying good used single tires from my tire guys for pennies on the dollar (they have a hard time moving even really good single tires), right now the vehicle has 2 Ecopas rear and 2 much treadier tires front but not designed for efficiency. The car is reading 4.4 m/kWh right now, which began after the heating season was over and the studded snows came off. I know that I am ahead dollar-wise, never gonna save $150 per tire in reduced electrical use (especially since the bloody tires keep getting punctures and can not get repaired), and I also know that I am guilty of wasting a bit of a limited resource- electricity. Sometimes you gotta be true to yourself and be a parsimonious (frugal)Scotsman.
2015 Leaf sold
2019 Leaf Plus S as of 9/30/19
Specialized Hardrock with Bafang midmount 750W
Liv Roam ebike
Stihl battery weedwacker and lawn mower
2023 Subaru Solterra Premium (the cheapest model)