Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial rubber zone positioned between and extending beneath two stratified lateral tread rubber zones. The tread configuration contains an underlying carbon black-rich base rubber layer. The lateral tread rubber zones are therefore spaced apart from each other with the intermedial tread zone therebetween and also spaced apart from the tread base rubber layer with the intermedial tread zone therebetween. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties.

Abstract: A tire includes a tread portion having at least one circumferential main groove extending in a circumferential direction of the tire and spaced axially apart from an equator of the tire. The groove has a circumferential profile shape including an inner wall portion extending radially inward from an axially inner edge of the groove, an inner arc portion continuous with the inner wall portion and having a smaller radius of curvature than the inner wall portion, an outer wall portion extending radially inward from an axially outer edge of the groove and having a larger length than the inner wall portion, an outer arc portion continuous with the outer wall portion and having a smaller radius of curvature than the outer wall portion, and a groove bottom portion extending straight from the outer arc portion toward the inner arc portion while being inclined in a radially inward direction whereby the groove bottom portion has a constant radius of curvature.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of a silica-rich intermedial rubber zone positioned between and extending beneath two carbon black-rich lateral tread zones. The tread configuration contains an underlying carbon black-rich base rubber layer. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties. A path of least electrical resistance extends from a lateral carbon black-rich rubber tread zone to the carbon black-rich tread base layer by an extension of a lateral tread zone or by an intermediate carbon black-rich rubber bridge.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread including stratified lateral tread zones and peripheral sidewall extensions. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial zone positioned between and two stratified lateral tread zones together and, in addition, peripheral sidewall extensions. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated 100° C. hot rebound physical properties. The intermedial rubber zone, or layer, overlays a tread base rubber layer and underlies the lateral tread layer zones. The lateral tread zones are stratified in a sense of being separated from each other and also separated from the from the tread base rubber layer by the intermedial rubber layer.

Abstract: The invention relates to a tire with circumferentially zoned tread including peripheral sidewall extensions. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial rubber zone positioned between and extending beneath two stratified lateral tread rubber zones and, in addition, peripheral sidewall extensions. The tread configuration contains a carbon black reinforced tread base rubber layer underlying the intermedial tread rubber zone. The lateral tread rubber zones are therefore spaced apart from each other with the intermedial tread zone therebetween and also at least partially spaced apart from the tread base rubber layer with the intermedial tread zone therebetween.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial rubber zone positioned between and extending beneath two stratified lateral tread rubber zones. The tread configuration contains an underlying carbon black-rich base rubber layer. The lateral tread rubber zones are therefore spaced apart from each other with the intermedial tread zone therebetween and also spaced apart from the tread base rubber layer with the intermedial tread zone therebetween. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of a silica-rich intermedial rubber zone positioned between and extending beneath two carbon black-rich lateral tread zones. The tread configuration contains an underlying carbon black-rich base rubber layer. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties. A path of least electrical resistance extends from a lateral carbon black-rich rubber tread zone to the carbon black-rich tread base layer by an extension of a lateral tread zone or by an intermediate carbon black-rich rubber bridge.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread including stratified lateral tread zones and peripheral sidewall extensions. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial zone positioned between and two stratified lateral tread zones together and, in addition, peripheral sidewall extensions. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated 100° C. hot rebound physical properties. The intermedial rubber zone, or layer, overlays a tread base rubber layer and underlies the lateral tread layer zones. The lateral tread zones are stratified in a sense of being separated from each other and also separated from the from the tread base rubber layer by the intermedial rubber layer.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread including stratified lateral tread zones. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial zone positioned between and two stratified lateral tread zones. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties. The intermedial rubber zone, or layer, overlays a tread base rubber layer and underlies the lateral tread layer zones. The lateral tread zones are stratified in a sense of being separated from each other and also separated from the from the tread base rubber layer by the intermedial rubber layer. The stratified lateral tread zones are peripheral tread zones, or layers.

Abstract: The invention relates to a tire with circumferentially zoned tread including peripheral sidewall extensions. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of an intermedial rubber zone positioned between and extending beneath two stratified lateral tread rubber zones and, in addition, peripheral sidewall extensions. The tread configuration contains a carbon black reinforced tread base rubber layer underlying the intermedial tread rubber zone. The lateral tread rubber zones are therefore spaced apart from each other with the intermedial tread zone therebetween and also at least partially spaced apart from the tread base rubber layer with the intermedial tread zone therebetween.

Abstract: This invention relates to pneumatic rubber tires for high severity service, particularly a truck tire, having a circumferential tread of a cap/base configuration comprised of an outer tread cap rubber layer and an underlying tread base rubber layer wherein said tread cap rubber layer is comprised of a precipitated silica reinforced rubber comprised primarily of cis 1,4-polybutadiene rubber.