IZUMI KAI SUPER TOUGH 1/2X1/8 106 LINKS beto The S Disc is engineered

The S Disc is engineered to provide exceptional aerodynamic efficiency and gives you faster straight-line speeds and greater stability in all riding conditions

This is simply the best chain available for single speed

One of the strongest and most durable chains on the market

Designed and tested to be strong / lightweight and dependable

The saddle provides all-purpose comfort based on the proven shapes of Unicanitor

IZUMI KAI SUPER TOUGH 1/2X1/8 106 LINKS beto The S Disc is engineeredSpecifically designed for the Tokyo Olympics and tested in partnership with USA Cycling, this chain features a very slick, highly functional new coating on the plates, seamless bushings and rollers which is said to reduce resistance and drag by 10% compared to the traditional Model V Super Toughness when used in combination with a high performance lubricant. This new technology also increases hardness, durability and corrosion resistance.