The Goodyear & Tire Rubber Company

Vaibhav Nawale

Jean-Julien Edouard Ghislain Krier

Philippe Joseph Auguste Muller

Lionel Jean-Marie Bortolet

Roland Willibrord Krier

Carolin Anna Welter

Didier Winkin

Yves Donckels

Jean-Claude Knepper

Ettore Passante Spaccapietra

Philippe Schmit

Jordan Rosso

Betul Buehler

Marc-André Robert Paulus

Dawn Michelle Johnson

Marco Nicolò Coccon

Arun Prasath Manogaran

Peter Cornelius Maus

This invention relates to pneumatic radial tires which exhibit improved rolling resistance (provide better fuel economy) and improved performance characteristics. More particularly, this invention relates to the structure of radial ply tires for heavy load vehicles such as trucks, buses, and the like. It is based upon that finding that a defined profile of the outer surface of the sidewall portion can lead to a tire with reduced rolling resistance and a reduced generation of heat. The reduction in rolling resistance is obtained by a specific shaping of the bead portion of the tire which allows a bead mass reduction with an acceptable trade-off with regard to bead durability.

Radial tire

Tire

In accordance with the invention, a ply coat rubber composition for a tire ply comprises from 60 phr to 90 phr of natural rubber, from 10 phr to 40 phr of synthetic polyisoprene, from 30 phr to 80 phr of pre-silanized and precipitated silica, from 0.1 phr to 5 phr of a cobalt salt, up to 15 phr of carbon black, up to 5 phr of resin, and up to 8 phr of oil. Moreover, the invention is directed to a tire comprising such a rubber composition.

Ply coat rubber composition and a tire comprising a ply coat rubber composition

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Lorentzweiler, Luxembourg

Vaibhav Nawale