Patent ID: 8869858

Claim:
A pneumatic tire for heavy vehicle service, comprising: a carcass; a tread disposed radially outward of said carcass; a sidewall intersecting said tread at a shoulder; a belt reinforcing structure positioned radially between said carcass and said tread, said belt reinforcing structure being four belt layers, a radially inner first belt layer and a second belt layer arranged adjacent to and radially outward from said first belt, a third belt layer overlaying and adjacent to said second belt layer and a fourth belt layer overlaying and radially outward of said third belt layer, each belt layer being reinforced with a plurality of parallel cords, the belt structure characterized by having the first, second and third belt layers having the cords directionally oriented relative to an equatorial center plane of the tire extending to the left (L) and the fourth belt layer having the cords extending to the right (R) to form a four layer stacked belt structure of cords sequentially oriented LLLR; and wherein the first belt layer and second belt layer have the parallel cords oriented left (L) angularly in the range of 45 degrees to 65 degrees relative to the equatorial plane EP, the third belt layer has cords oriented left (L) in the range of 16 degrees to 25 degrees relative to the equatorial plane EP, the fourth belt layer is oriented right (R) in the range of 16 degrees to 25 degrees relative to the equatorial plane EP and wherein the first belt layer has cords angled at a larger angle than the cords of the second belt layer, the cords of the fourth belt layer are oriented to the right (R) at an angle greater than the cords of the third belt layer that are oriented to the left (L) and the cord angle of the first belt layer is 5 degrees left (L) greater than the cords of the second belt layer and the fourth belt layer has cords oriented right (R) at least 3 degrees or greater than the left (L) angle of cords of the third belt layer.