| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat pneumatic tire having an aspect ratio of not more than 55% which is lightweight and has rigidity and good drivability. SOLUTION: This tire has two carcass layers 1 and two belt layers 2, wherein the ply-codes of the first and second layers of the carcass layers 1 cross each other at an angle of less than 90 degrees to the peripheral direction of the tire, a pair of right and left bead cores 3 and bead fillers 4, and a reinforcement layer 7 from a side wall 5 to a buttress 6. The reinforcement layer 7 comprises rubber layer containing an organic fiber code whose heat shrinkage before vulcanization is equal to or more than that of the ply-code of the carcass layer 1 and whose crossing angle is larger than that of the ply-code of the carcass layer 1, and extends outside in the radial direction of the tire from near the top ends of the bead cores 3 to the bottom ends of the belt layers 2. |
