The all-new Shimano Ultegra 6800 external bottom bracket cups are designed to fit frames with traditional threaded bottom bracket shells. The new 6800 bottom bracket cups are 14 grams lighter than the 6700 version, and reduce friction by up to 50% for more efficient spinning.
14g lighter than 6700 version
Reduces friction by 50%
Fits frames with threaded BB shells
Compatible with all Shimano Hollowtech II cranksets