JMP aluminum racing sprockets Who puts much emphasis on light weight, quality and design, will hardly find better sprockets. The JMP aluminum racing sprockets are made of 7075 T6 aluminum, which is mainly used in aviation. This aluminum alloy is characterized by enormous strength and tightness as well as low weight. Milling in the tooth base of the sprocket guarantee optimal self-cleaning. These cuts ensure that the dirt can not get between the teeth and thus Do not wear the chain and sprocket as fast as normal aluminum sprockets. Apart from the "protective effect", the sprocket is not only more durable but also looks higher quality. - high performance - unique quality - high quality - low weight