Pneumatic radial tires for passenger cars having a low...

Details Pneumatic radial tires for passenger cars having a low... Pneumatic radial tires for passenger cars having a low...

B - Operations, Transporting

60

C

152/96

B60C 5/14 (2006.01) B60C 9/18 (2006.01) B60C 15/06 (2006.01)

Patent

CA 1120843

Abstract of the Disclosure A pneumatic radial tire for passenger cars having a low rolling resistance is disclosed. The radial tire comprises a body reinforcement including a toroidal carcass composed of radially arranged cords and a belt superimposed about the carcass and consisting of plural rubberized plies each containing cords arranged at 60°-80° with respect to the radial plane of the tire, which cords of said plies being crossed with each other, and a bead reinforcement wherein the carcass is wound around a bead core to form a turnup portion, tread and sidewall rubbers covering these reinforcements. In the radial tire, a super-hard bead filler rubber is arranged at a region extending from the bead core to the middle part of the side portion, and a base rubber having a low loss modulus and a high resilience is arranged on at least both side edge parts of the belt at a volume ratio in the coating rubber for tread portion of 0.1-0.5.

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