Patent ID: 8919404

Claim:
A rubber composition for groove reinforcement in a tread for a tire comprising: at least one rubber component; between about 50 phr and 120 phr of a filler, wherein at least 20 phr of the filler is a high surface area carbon black wherein the high surface area carbon black has an iodine adsorption number of at least 100 g/kg; and between 10 phr and 30 phr of a phenolic resin; and wherein the tread has a tread rubber composition for road contact and the rubber composition for groove reinforcement is a different composition located adjacent a groove, covering at least a groove bottom, but not extending to the unworn surface of the tread, the rubber composition for the groove reinforcement having a shore A hardness >80 and an elongation at break more than 300 percent, and wherein the groove reinforcement has two radially extending portions forming at least partially opposing sidewalls, the adjacent groove and a radially inner base which is in direct contact with a supporting structure arranged under the tread forming distinct reinforcement areas with respect to the lateral direction.