Our sprockets will give you years and years of trouble free service. Race-Driven O-Ring Chain Race-Driven's O-Ring chains are designed for the casual, recreational driver. All chains include a masterlink. Made of hardened S45C steel. When purchasing a chain, do so according to the engine size of your machine and also to fit your riding style. Please check fitment chart for compatibility for your model. Our chains have a tensile strength in excess of 8200 lbs. Choose one that will match your machine and gear., Silver, Gold, Green, Blue, Red, Yellow Manufactured to meet or exceed OEM specifications. Yamaha 1991-1996 WR250 / 1991-1993 YZ250 Gold O Ring Chain & Sprocket... D'Addario J80 D'Addario Phosphor Bronze Octave Mandolin Strings - Medium Gauge 12-46 Mandolin Strings Set Fits 2002 2003 2004 2005 2006 Polaris Trail Blazer 250 The o-rings help keep the pins lubricated, which reduces friction and helps the chain last longer. About Us Race-Driven started in 2007, when we took our passion for the powersports industry and turned it into a thriving company. 11 Tooth Front Sprocket, 36 Tooth Rear Sprocket and 520-76L Gold O-Ring Chain; All Race-Driven sprockets meet or exceed OEM specifications and use hardened... 11 Tooth Front Sprocket, 36 Tooth Rear Sprocket and 520-76L O-Ring Chain All Race-Driven sprockets meet or exceed OEM specifications and use hardened S45C steel