Heavy duty pneumatic tire tread

摘要

A heavy duty pneumatic tire includes a tread in a crown of a tire body reinforced by a toroidal carcass extending between a pair of annular bead cores. The tread is formed with a pair of main wide grooves circumferentially spaced apart at least one half of a tread width of the tire on both sides of a central circumferential line and a wide subgroove extending along the central circumferential line and in parallel with the main wide grooves to form first ribs bounded by the wide subgroove and the main wide grooves and second ribs bounded by the main grooves and tread edges. Each first rib is formed with a narrow groove extending circumferentially to divide the first rib into two parts. The tire according to the invention is made superior in antiskid characteristic on wet roads by improving the drainage without sacrificing the wear resistance of the tire.