What are the differences between the Izumi chains?
Super Toughness NJS
Strong, tough and reliable, the Super Toughness V Track Chain never fails in races. It uses a special high-carbon alloy for the connecting pins—often used in low-friction ball bearings—which offers a 300% increase in durability compared to an IZUMI 401 chain.
Izumi-V is renowned among keirin racers for its strength and efficient power transfer and is of the few chains that meets the strict certification requirements of the Japanese Keirin Association (NJS).
NJS Stamped
106 Links
380g (106 links)
Outer plates: Gold
Inner plates: Dark Blue
Rollers: Silver
Pins: Black
Stiffness: ★★★★★
Friction: ★★★★☆
Durability: ★★★★☆
Style: ★★★★★
Affordability: ★★☆☆☆
Super Toughness Kai
Designed for Tokyo2020 Olympic Games, the Super Toughness Kai is the same design and construction as the standard super toughness, with a special surface coating is formulated to reduce resistance by a further 10% over the Super Toughness chain.
106 Links
380g (106 links)
Outer plates: Natural Steel
Inner plates: Natural Steel
Rollers: Natural Steel
Pins: Natural Steel
Stiffness: ★★★★★
Friction: ★★★★★
Durability: ★★★☆☆
Style: ★★☆☆☆
Price: ★☆☆☆☆