Patent ID: 6997836

Claim:
A belt for a continuously variable transmission, comprising a plurality of metal elements supported on a metal ring assembly having a plurality of metal rings laminated on one another and which transmit a driving force between a driving pulley and a driven pulley, wherein at least an innermost metal ring has a plurality of protrusions formed on an inner peripheral surface thereof, wherein an average contact width w of said protrusions, after being initially worn and being measured in a direction perpendicular to a direction of travel of the metal rings, is defined by an equation: w=L× ( Mr 1 /HSC ) wherein L is a length of at least a portion of the metal ring measured in a direction perpendicular relative to the direction of travel of the metal rings, Mr 1 is a load length rate 1 within the length L of the inner peripheral surface of the metal ring, and HSC is a high spot count within said length L of said inner peripheral surface of the metal ring, wherein said high spot count HSC is defined by either one of a number of said protrusions having a height exceeding a height at the load length rate 1 , Mr 1 or a number of said protrusions having a height exceeding a total height obtained by adding one half of an effective load roughness Rk to a height at which a total area of said projections and a total area of recesses in sections of said protrusions are equal to each other, and wherein said average contact width w is equal to or less than 16 μm.