Chris King have been making their own sealed bearings 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. 100% made in the USA. 5-year warranty. Fully serviceable sealed ceramic bearings. Bearing seals designed to work with our BB Injector Tool allowing you to easily put new grease in your bottom bracket bearings. Easily inject your choice of grease for different riding conditions. Learn more with our Grease Guide. Compatible with most 24mm crank spindles, including; Shimano Hollowtech II™, FSA™, RaceFace™, SRAM GXP™, Truvativ™ and Bontrager™ cranksets.