TRUCK TIRE TREAD WITH J SHAPED SIPE

A tread () for a heavy truck tire is provided that has an upper surface for engaging the ground, a leading edge, and a trailing edge forward of the leading edge in a rolling direction. The tread also has a J shaped sipe () that has a main portion () that extends from the upper surface. The main portion () has an opening at the upper surface and a bottom end () opposite the opening in a radial direction. A curved portion () extends from the bottom end () and has a bottom curved wall () that has a radius (r). The curved portion () extends from the bottom end () forward in the rolling direction (), and has a curved portion end ().