JT Sprockets (JTC520HDSGB120SL) Gold/Black 120-Link 520 HDS Ultimate Competition Drive Chain The JT HDS super heavy duty motorcycle chain is engineered for top level off-road racing use offering extreme performance at minimum weight with a 9 percent increase in strength over the JT HDR Chain Manufactured using leading edge technology and with only the highest grade of special steel alloys The specifications of the JT advanced power transfer chains meet or exceed the requirements of all modern motorcycles, street, MX, Enduro, off-road, and ATV JT HDS Super Heavy Duty Chains are constructed with quad riveted pins for an extra strong rivet that resists powerful lateral forces on the outer plate