The gear drives at Servo city go from 138 oz/in.@ 12 v all the way up to 1,100oz/in. So I'm sure there is plenty of torque available with these. <div> Again it is just a matter of working out which gear ratio would be best.</div><div> I am going to count how many RPM my Tamiya Panther G makes. This tank has the largest reduction out of all my tanks. I will count the rotations it makes at full throttle. This tank has an 80:1 ratio in it. After i do this I will be able to pick the best combination and that will tell me just how much torque in in/lb the gear drive makes.</div>