This Chris King external cup bottom bracket is specifically designed for Shimano-compatible external type crank/bottom bracket systems. Anyone owning a Chris King headset or hubs can appreciate their high build quality, great looks, strength, and durability. Their bottom brackets have those same traits and are very popular with many satisfied users.
The bottom bracket is constructed from precision ground and anodized alloy cups (choose your color) fitted with the industries best bearings. These bearings can have grease purged and injected with Chris King's BB Grease Injection Tool. So essentially, they are Sealed bearing that are serviceable. Threads on the cups are absolutely perfect, so they will install to your frame without issue. Center sleeve is attached to the cups with O-ring seals and succeeds in keeping dirt and condensation out of the bottom bracket assembly. The total weight is 106 grams including 90 grams for the cups and bearings, 8 grams for the spacers and 8 grams for the sleeve.
These BB's are compatible with Shimano and Shimano-syle outboard cranksets only and will not work with SRAM/Truvativ GPX or FSA cranksets.