[Yoda]

The optimum configuration will give you greatest speed but still have enough torque to cause the wheels to break traction (peel out) before the motor stalls. That optimum configuration varies from bot to bot and is up to you to figure out how to best implement it with your own robot.

I've told you guys in the past:

Never underestimtate The Colonel.

Things live within that we mortals will never know.