The sram xx1 11 speed chain the sram xx1 was built with a dedicated 1x design philosophy making it simpler lighter and more durable than any other no matter where you ride no matter what youre up against sram xx1 unstoppable the xx1 chain represents the latest breakthrough in a long line of precise light weight chains from sram its designed to deliver the greatest strength and reliability to a drivetrain that doesnt have it make compromises for front shifts this is a 1 x 11 xx1 sp