Turnup reinforcing structure for pneumatic tires

摘要

A pneumatic tire (10) includes a tread (12), two inextensible annular beads (28a, 28b), a carcass ply having two turnup end portions (30a, 30b), and an annular cap structure (100) encompassing at least one of the turnup end portions. Each turnup end portion (30a, 30b) is wrapped around one of the annular beads (28a, 28b). The cap structure has a U-shaped cross-section for surrounding the turnup end portion. The cap structure is constructed of reinforced fabric with fibers oriented in the range from -45° to +45° with respect to a radial direction of the pneumatic tire (10).