You won’t find a stronger, longer-lasting, or more beautiful chain than the legendary Super Toughness, made from pure Japanese steel. Izumi uses a special high-carbon alloy for the pins—often used in low-friction ball bearings—which offers a 300% increase in durability compared to a standard chain. One of the few chains that meet the strict certification requirements of the Japanese Keirin Association (NJS), the Izumi-V is renowned among keirin racers and track riders for its strength and efficient power transfer.