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. - Doubling the sealing surfaces results in a significantly better seal against dirt and water and a doubled grease reservoir. - 25% more mileage over an O-ring chain thanks to the unique JX-Ring technology. - Made by one of the leading Japanese chain manufacturers.