OCTALINK Bottom Bracket, Smooth and precise shifting performance with HYPERDRIVE technology. Splined bottom bracket for use with Shimano Octalink chainsets.

Cartridge design allows easy installation without adjustment. Sealed cartridge assembly with oversize ball bearings - maintenance-free high efficiency rubber seals keep out dirt, mud, and water

Features

• Durable spline reinforced construction
• 26 g lighter weight than BB-ES25
• Good chain line control with chain stabilizer
• Stiff and lightweight for efficient power transfer
• Quick and precise assembly
• Chain case compatible
• With or without chain guard
• ALIVIO logo (T4060), SHIMANO logo (T4010)
• Better sealing performance (SM-BB52)
• Color options: Black, Silver