The World’s First Viable Retrofittable Central Tyre Inflation System for 4×4 Vehicles. At Rapid Inflation Systems we have invented the only practical central tyre inflation system suitable for use on four wheel drive vehicles. Our system does not require replacement of any factory components and has no vulnerable hoses from the fender to the hub as in other central tyre inflation systems. With the ability to inflate and deflate your tyres from the comfort and safety of the driver’s seat a Central Tyre Inflation System from Rapid Inflation Systems is the ultimate product to enhance your off-road experience.