These Xtreme Upgrade boxed chain & sprocket kits offer the best of the best, but application selection a lot easier as you only need to order one item instead of three individually. The Xtreme Upgrade kits contain the highest possible specification RK chain for the application and will be significantly better than the OE chain, with high quality Afam steel sprockets. All boxed kits are supplied as standard gearing configuration.Upgrade spec chain and Afam sprockets provide strength and reassurance.Kits include bike specific front and rear sprockets and an open ended drive chain.Cost effective option to buying all items separately.Suitable for a wide range of motorcycles on the road today these kits provide the rider with a quality option rather than buying the costly OE alternative.The chain supplied is a bike specific chain and will be one of the following spec chains:Heavy Duty HSB Gold Roller Chain - Increased strength compared to the standard chains. Manufactured from carbon alloy steel, the chain is heat treated and shot peened for maximum strength and outstanding durability.XSO Black X-Ring Chain - Lightened chain weight while maintaining the strength required to emphasise the light feeling of acceleration. The RX-Ring has “X” shaped seals that help produce longer wear life than standard O-Ring chains.Heavy Duty ZXW XW-Ring Gold Chain - RK's flagship chain! Designed to meet the high requirements of 1000cc and above bikes. Designed to be the strong, long-lasting and offer the highest performance.