[oldtamiyaphile]

Originally Posted by Ecky

Although a wider tire can have lower rolling resistance, car companies making "economy supercars" use narrow and tall tires.

EDIT: BMW i3 tires: 175/55r20 - tall, narrow, use LRR compounds

I find it telling that (almost) no no other MPG car has gone that route. All the current day EV's have pretty wide tyres, so I wouldn't read too much into the i3's tyre spec.