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D.I.D's Patented X-Ring design has the best sealing properties of any O-Ring chain, D.I.D X-Rings keep the dirt out and lubrication in for the longest wear life. The X-Rings twist between the side plates instead of being squished to reduce friction and minimize power loss. High carbon steel rear sprockets are heat treated for maximum durability and long life, Countershaft sprockets are made from chromoly steel for superior strength and durability. Fits: Triumph Daytona 675 06-13; Daytona 675R 11-13; Street Triple 08-13; Street Triple R 11-13. D.I.D Chain Model: 525VX; Chain Color: Steel; Chain Length: 116; Gearing (Front/Rear): 16 tooth/47 tooth.