Motor rotates at rated RPM range at any velocity, which runs within high efficiency range.
It has no hydraulic equipments to bring complexity and heavy weight, which significantly reduces mass.
Small and light design enables in-wheel type without energy losses of power shift axles.
For the same performances comparing to single speed EV, motor output of a half power is enough, which reduces energy consumption.
Consequently, efficiency could increase by double than single speed EV.