PRODUCTION OF PNEUMATIC RADIAL TIRE

摘要

PURPOSE:To ensure a required negative ratio even in the perfect abrasion state of a tread without arranging a special pressing reinforcing layer. CONSTITUTION:In the production of a pneumatic radial tire having an annular group at the almost central part of a tread surface part, a depressed groove 10 where a belt 5 and a tread 8 are together inwardly depressed in the radius direction of the tire is provided to the almost central part of a cylindrical tread band 9 containing the belt 5 in the lateral direction thereof and the tread band 9 is fitted to the outside of a green case to be molded to form a green tire having the depressed groove 10 present at the almost central part thereof in the lateral direction as it is.