We've been making our own sealed bearings here at King for over 32 years and never has there been a component that benefited more from their strength and durability than the bottom bracket. Yes, the Chris King bottom bracket is here and ready to take on the most challenging conditions your cycling adventures can deliver. The Chris King bottom bracket is specifically designed for Shimano and Sram Style-compatible external type crank/bottom bracket systems and delivers every benefit you've come to expect from King and in the wide array of colors only King can do. An available grease injection tool allows the bearings to be purged of existing grease and debris and new grease run through. What better way to maximize the life of your bearings than to do routine maintenance? Especially when it's this easy. Racers take note! With the Chris King bottom bracket and injection tool, you can train day-to-day with a durable high-viscosity grease and race with a light, fast-rolling low-viscosity grease or oil. Imagine your current Friday night leg-shaving ritual finishing with a few minutes in the garage to get your bike as smooth as you are.