Hi AH64,

The torque rating you have is the maximum rotational force or turning moment that the motor can supply at the shaft at the 12v supply and a rotational shaft speed of 4800 RPM at this voltage........to determine if this motor will move your tank or not, you would could do the following:

a) Build a mechanical engineering mathematical model that reflects your tank design, and from
the results, modify your design accordingly.
b) Put it in the tank and try it.

With electric motors, one can roughly assume that Voltage = speed and current = Torgue
With our tanks, speed is not that critical but torque is, so we want high torque with minium current
drain to preserve our motor & electronics life and give us long duration from low battery drain.
This is why we use gearboxes, since they provide an increase in output torque at reduced current drain but at lower RPM's. Power is NOT increased (A common mis-understanding). It is unlikely that a motor on direct drive will provide enough torque to drive your tank, and even if it did, the current draw could be unacceptably high..........

This is quite a complex area and I have only touched on it briefly as an explanation but I hope it helps

Cheers

CaptainB