The JT Z1R super heavy duty X-Ring motorcycle chain is engineered for maximum durability and strength offering a high performance in both road and off road use X-Ring seals are used for a better seal and produce less friction than conventional O-ring chains, solid bushings provide enhanced resistance to distortion from repetitive shock loading Manufactured using leading edge technology and with only the highest grade of special steel alloys, JT advanced power transfer chains meet or exceed the requirements of all modern motorcycles, street, MX, Enduro, off road, and ATV JT Z1R Super Heavy Duty Chains are constructed with quad riveted pins for an extra strong rivet that resists powerful lateral forces on the outer plate Specs Roller Diameter 10.32 mm; Pin Length 25.3 mm; Plate Thickness Inner 2.4 mm; Plate Thickness Outer 2.6 mm; Weight per 100 links 4.74 lb. Average Tensile Strength 10694 lb. No. of Pin Rivet Presses 4; Master L