I have been designed/built and tested what I call a "Jet Wheel". It can be mounted on any AATV tire. It is a type of "Reverse Banki" design that produces thrust even if the tire is totally underwater. In the vids you will see it in action. It has been GPS'd at 3.0 mph. You can mount/dis-mount in 30 sec. When mounted on the rear tires of the Frontier it produced so much thrust that it was in danger of sinking the Argo! It also gives excellent directional control, and can be used with tracks.