JMT chain set consisting of a JMT chain, a sprocket and a pinion. JMT drive chain X2 series - JMT X2 chains are equipped with a unique X-ring technology. - The doubling of the sealing surfaces results in a clear better seal against dirt and water and a doubled grease reservoir. - 25% more running performance compared to an O-ring chain thanks to the unique JX ring technology. - Manufactured by one of the leading Japanese chain manufacturers. - Made in Japan.