What would people reckon to this set up...

6x (3 per side) RS775 12V Motor + Banebots P60 16:1 Gearbox + 2x 98mm Banebots wheels

I have calculated a speed at the output shaft when running on a 14.8V lipo to be ~560RPM and have a top theoretical speed of 10Km/H.

And at peak efficiency I should get... 16.4Kg/cm at the ground, which seems a little low... hmmm maybe I have duffed that last bit of maths...