Patent ID: 7040366

Claim:
A tubeless pneumatic tire comprising: a carcass comprising a plurality of carcass plies stacked one on the other, radially of the tire, each of said carcass plies having a carcass cord web and topping rubber layers unified with the carcass cord web on opposite sides thereof by calendering, said plurality of carcass plies including an innermost carcass ply extending from the tread portion through the sidewall portion to the bead portion and turned up around the bead core outwardly from the inside of the tire in the axial direction, and an outer carcass ply extending from the tread portion through the sidewall portion to the bead portion and turned up around the bead core inwardly from the outside of the tire axis in the axial direction so as to cover the turned-up portion of the innermost carcass ply; and an inner liner formed of a butyl-based rubber and covering a radially innermost topping rubber layer, wherein the topping rubber layer of an interior surface of the innermost carcass ply is formed of a butyl-based rubber, and the topping rubber layers other than the topping rubber layer defining the interior surface of the innermost carcass ply are formed of a diene-based rubber material.