A pneumatic tire that can maintain processability and tire performance such as rolling resistance or a wet performance of a tire, overcome the problem of non-conductivity by a tread rubber of silica formulation or the like, and sustain conductive performance of a tire over a long period of time is provided....http://www.google.fr/patents/US20090114321?utm_source=gb-gplus-shareBrevet US20090114321 - Pneumatic Tire
