JT Sprockets (JTC520X1R108RL) Steel 108-Link 520 X1R Heavy Duty X-Ring Drive Chain The JT X1R 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 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 X1R Heavy Duty Chains are constructed with quad riveted pins for an extra strong rivet that resists powerful lateral forces on the outer plate