The application of anti-fatigue agent G-108（complex of m-phenylenediamine，cobalt salt and phenolic resin） in the tread underlayer compound of off-the-road tire was studied.The results show that，the heat build-up of the tread underlayer compound with anti-fatigue agent G-108 decreased significantly，self-adhesion property increased，vulcanization characteristics and physical properties changed little，and the endurance performance of the finished off-the-road tire increased.
