Patent ID: 6213179
Filing Date: 2001-04-10
Classification: B60C

Abstract:
A run-flat tire system for a motorcycle comprisinga tire comprising a tread portion, a pair of sidewall portions and a pair of bead portions and defining a tire cavity when mounted on a wheel rim, the tire cavity having a maximum section width (Wi) when the tire is inflated to a standard pressure, the tire cavity having a maximum diameter (dd) and a section area (Sd) in a free state when the tire is not inflated,a buffer including an annular body made of an elastic closed-cell material disposed in the tire cavity, said buffer being provided in a radial inner surface with a circumferentially extending groove,a tube disposed in said circumferentially extending groove,the outside diameter (D) of the buffer under its free state being in the range of from 0.90 to 1.0 times said maximum diameter (dd),the maximum section width (W) of the buffer under the free state being in the range of from 1.05 to 1.2 times said maximum section width (Wi),a gross sectional area (S) of the buffer under the free state inclusive of the sectional area (Sd), andthe inside diameter of the buffer under the free state being smaller than the diameter at a bead base line of the tire and the radically outer surface of the buffer comes to a point at the center line of the buffer.