So you move the batteries a bit to get your butt lower!
Get your butt lower, lower the roofline, reduce frontal area by 1/4 sq ft. Of course I was not involved in designing or building the car so I don't know the constraints. Playing armchair car designer is fun, though.
It could easily be a bit longer- as we know, length can be good for aero as well. They are Civic HX wheels, the same kind I'm buying for Ren.