[Old Professer]

Good point; I was concerned with the added mass to the drive wheels which is the so-called unsprung wieght.

[Poincare]

I was concerned with the added mass to the drive wheels which is the so-called unsprung wieght.

Yup. It makes more sense to have the weight of the motors inboard. But on a bus it doesn't matter so much I guess as long as the streets are relatively smooth.