New C13 chain - specially developed for the Ekar 1x13 speed gravel group Special profile teeth on gears and cogs: for efficient transmission, smooth shifting, and high safety Narrow profile: lightweight, robust, and efficient Durable and resistant links - with steels of varying carbon content and surface treatments that ensure strength and wear resistance Exclusive lubrication system through an ultrasonic bath - for long-lasting efficiency Available with classic pin and C-Link™: options for every type of gravel rider.