Dry nitrogen gas is inert gas, less susceptible to temperature and pressure changes. Nitrogen penetration in the Truck tyre in the low tire pressure can be maintained long-term stability and reduce the chance of a puncture, an increase of traffic safety. Ordinary air contains water, oil grading impurities, resulting in oxidation after accelerated aging Truck tyre, steel corrosion, the use nitrogen tire filling extends Truck tyre, steel rim life, which reduces the production of tires costs, protect the environment. Truck tyre tire pressure nitrogen to maintain stability and reduce the resistance in the vehicle, reducing the amount of fuel and reduce Truck tyre wear and lowers the cost; and driving on the uneven pavement can reduce vibration, reduce Truck tyre noise, so that drivers become a kind of enjoyment. Truck tyre is added to a high purity nitrogen.