Shimano keskio BB-R60 hollowtech II

″The silky-smooth steel bearings, advanced sealing, and high manufacturing tolerances make the SM-BBR60 the perfect bottom bracket choice for either your English- or Italian-threaded frame.

The 6800 bottom bracket weighs in just around 76 grams, making it close to 15 grams lighter than its predecessor. In addition to the making the bottom bracket smaller and lighter, Shimano says that the design of the BBR60 reduces rotational friction by 50%. This is said to be due to advancements in Shimano′s sealing technologies.

The Shimano Ultegra 6800 SM-BBR60 Bottom Bracket is available in one size and for either English (68mm) or Italian (70mm) threading.

Around 15 grams lighter than previous version
Reduced rotational friction by roughly 50%
Steel bearings with Shimano’s advanced sealing technologies
Compatible with English threads″