60 mph mamba brushless setup for e-maxx, would this work?

[suicideneil]

I'll second that. Under gearing is just as bad as overgearing really, just in a different way. Better to have a nice light but strong truck, and match it to a sensible BL setup. The 8xl on 12cells & MM is perfect, take a look around and you will see someone has a 6.8lb Emaxx- the suggested BL setup in a truck that light will easily make it push 40mph or more = a light truck can be geared a little higher for more speed with out overly stressing the esc.