ecoangel wrote:Lower it and fit 155 tyres all round - lower fontal area has big effect over 40 mph.
Some of that depends on how the air underneath is ducted. THe bottom of the i3 is fairly smooth to minimize drag. THey purposely chose narrow/tall tires to minimize their affect on drag while maintaining a decent tire patch.
Without an air tunnel to test things, it's a lot of expensive trial and error to try to improve on this. The i3 was designed from the ground up to be both functional and efficient with EV power in mind. Obviously, some things were overcome by cost, but the difference may not be worthwhile in actual efficiency and economics. Maybe aesthetics, but that's a personal viewpoint. If there were some easy improvements, they would have been done during vehicle development given the goal for the car. The thing was not rushed into production and started with a clean slate.