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289.776:1
With our gearbox that makes 8113.728 pulses per revolution.
The post with this numbers is here: Whats inside the gearbox/motor?
The max torque is around 30KG and is quite high, can be traded for speed.
In GroundControl the steps/revolution, number of teeth on the sprocket and feedrate in mm chain/min can be set manually to adjust different motors.
Kind regards, Gero
Edit: Old post and some links might not work, could still be of interest:
where-to-obtain-the-main-motor-worm-gear-encoder