Provided is a pneumatic radial tire including a carcass layer composed of a carcass ply 12 and a spiral belt layer 26 composed of steel cords wound spirally substantially in parallel with each other to a tire equator surface. Errors are detected in a bitstream as it is decoded using different levels of error detection based on decoding characteristics. The ring and the mesh have a slit therein extending radially so that the ring may be placed about the esophagus. A first yoke is then molded around two aligned stub axle bearings and an end of a first axle while, similarly, a second axle is molded around the bearings on the other pair of stub axles and an end of a second axle.