Nitrogen inflation is the process of replacing regular compressed air with this gas. MERITS: ❈ Safety: Nitrogen that is close to inertia gas is dry and not easy to expand by heat and contract by cold so that to reduce the tire blowing when running at high speed. ❈ Comfort: Stable tire pressure can strengthen the road adherence. ❈ Oil saving: Due to the characteristic of nitrogen, little effect on tire pressure caused by temperature and to keep stable pressure.