[aerohead]

I looked at the drag tables.
Ecorunners body is essentially a streamline body of revolution of 5.5:1 fineness ratio.
In free air,and super-critical Reynolds number(11000000) it is rated at Cd 0.047.
In ground proximity this doubles to Cd 0.094.
Then you add wheels.
I'm pretty certain that there's some legderdemain going on with claims.