Radial tire with improved ply line

摘要

A radial ply tire (200) has a tread (210), a belt structure (212), and a carcass (216) comprising two sidewalls (226A,226B), two beads (220A, 220B) and one or more plies (222). The one or more plies have a loaded shoulder ply radius (R2L) (ply line in the shoulder area when the tire is loaded) that is smaller than an unloaded shoulder ply radius (R2U) (ply line in the shoulder area when the tire is unloaded). This design eliminates tread-lift and eliminates the need for decoupling grooves in the tread at the shoulders.