This is a Shimano SM-BBR60 Bottom Bracket Unit. ...
Weighing in at 77g, the SM-BBR60 Ultegra Bottom Bracket is 14 grams lighter than the 6700 bottom bracket offering professional level technology for the everyday cyclist.
The Answer European Square Tapered Titanium Bottom Bracket ...
features a lightweight hollow titanium spindle enclosed by a carbon BB body and smooth rolling sealed bearings. This incredibly light JIS bottom bracket is available in multiple spindle length options but does ...
cranks spinning buttery smooth with their 4, high-quality sealed cartridge bearings. Also includes anodized spacers, internal bearing spacer (approximately 49mm), and threaded cups. Uses a 36mm wrench for installation.