The Shimano BB-ES300 Octalink Bottom Bracket is made to give you smooth pedalling and reliable performance on both road and mountain bikes.

With Shimanos Octalink 8-spline design, it creates a strong connection between your crankset and bike frame.

This means less flex, better power transfer, and a more efficient ride.

• Octalink Interface is an 8-spline axle for a secure fit and improved power transfer.
• Sealed cartridge design keeps dirt out for long-lasting durability.
• Smooth Bearings reduce friction for easier pedalling.
• Compatible with Shimano Octalink cranksets and works for road, MTB, and trekking bikes.