Shimano Ultegra 6600 10 Speed Bottom Bracket

«  ↑  » Shimano Ultegra 6600 10 Speed Bottom Bracket By combining crankset and bottom bracket into one piece, a harmony of strength and stiffness is achieved. The wider bearing stance of the SM-FC6600 provides increased stiffness and efficiency. Easy installation, adjustability and maintenance make this the ultimate bottom bracket. English (68), Italian (70). Item no longer available. Click Search to find alternatives...