Shimano 105 5800 / Ultegra 6800 Bottom Bracket
The Shimano 105 5800 / Ultegra 6800 bottom bracket offers a slightly updated shape and promises of up to half the friction over the previous 6700 bottom bracket.
The 105 5800/Ultegra 6800 bottom bracket shaves approximately 14g over its predecessor, weighing in at just 63g.