The Michelin Tweel is a revolutionary tires and wheel assembly for skid steer machines that uses poly resin fins instead of air to support the load of the machine. This allows for a virtually zero down time tire without the drawbacks and limitations of solid skid steer tires.No Maintenance . There is no need for complex wheel/tire mounting equipment. Once they are bolted on, there is no air pressure to maintain .they firstly buffed down the surface of the Tweel and then the technicians filled the remaining gaps by using rubber! Afterwards they cured for 4 hours, while being exposed to heat and pressure! It was all worth of it since a high quality Tweel came out of their garage as a result of hard work!