Izumi Super Toughness Kai Chain Tools these extensions also feature a

these extensions also feature a universal 22

The tooth section sits outboard of the hubs lockring thread

our extensions offer the ability to change grips as your position develops

fortifying strength and stiffness where it matters most while trimming excess weight elsewhere from the baseline construction

The extensions have built in design features to help fine-tune your position through:

Izumi Super Toughness Kai Chain Tools these extensions also feature aSpecifically designed for the Tokyo Olympics, this chain features a very slick, highly functional new coating on the plates, 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. Visit the our handy IZUMI Chain Guide for more information.