Abstract: My invention particularly relates to an apparatus designed to provide the means of checking and replenishing the air supply in a pneumatic spare tire that is stowed in a specially designed carrier or receptacle located in a rearward underslung and inaccessible location as has been adapted to many motor vehicles in use today, including various foreign and U.S. manufactured pick-up trucks, station wagons, recreational vehicles, sports cars such as the U.S. manufactured Chevrolet Corvette and to a lesser extent certain compact automobiles. This represents a departure from the traditional practice of enclosing the spare tire either in a closed compartment or trunk within the body of the vehicle.