Pneumatic tire with tread siping

摘要

A tire having a tread (10) has at least one tread element with a multidimensional sipe (22) formed in the tread element. The sipe (22) has a width W, a depth Ds, and an effective length Le. The sipe has a first radially outermost portion (28) with a constant effective length Le, a second transitional portion (30) with a gradually increasing effective length Le, and a third radially innermost portion (32) having a constant effective length Le greater than the effective length of the first portion (28).