The Shimano 105 BB-5700 Bottom Bracket has the same design used in Dura-Ace and Ultegra 10-speed systems. In fact, without labels, you might not be able to distinguish this 105 bottom bracket from the higher priced units from either an aesthetic or performance standpoint. The sealed cartridge bearings are housed outside of your frame, pressed into cups that thread into the bottom bracket shell. The wider bearing stance is one reason why Shimano's 105 Crankset feels so stiff and provides an instant transfer of your power to the rest of the drivetrain.

---

Features & Specs:

Improved sealing provides smoother rotation and longer durability

Wider bearing stance increases stiffness, efficiency and stability

Backwards compatible

95g


Manufacturer Part Number: 5700