Shimano BB-ES300 Bottom Bracket, 73-121mm

Shimano BB-ES300 Bottom Bracket

• Octalink Splined Interface: Creates a stiffer, more rigid crank assembly compared to square tapered spindles.

• Oversize Hollow Spindle: 22mm cold-forged chrome-moly spindle reduces weight while improving strength and rigidity.

• Sealed Cartridge Bearings: High-efficiency rubber seals keep out dirt, mud, and water for maintenance-free operation.

• Easy Installation: Cartridge design allows straightforward fitting without adjustment.

• Multiple Sizes Available: Shell widths: 68mm or 73mm; axle lengths: 113mm, 118mm, 121mm, 126mm; E-type option for E-type front derailleurs.

The Shimano BB-ES300 Bottom Bracket is a high-performance splined bottom bracket designed for use with Shimano Octalink chainsets. Built to deliver rigidity, durability, and maintenance-free performance, it is ideal for road, MTB, and hybrid bikes using Octalink cranksets.

With a sealed cartridge design and oversized hollow spindle, the BB-ES300 ensures smooth, efficient pedalling while resisting dirt, mud, and water intrusion, perfect for riders seeking long-lasting reliability.

Technical Specifications:

• Thread Standard: British (BSA)

• Axle Standard: Octalink

• Shell Width Options: 68mm or 73mm

• Axle Length Options: 113mm, 118mm, 121mm, 126mm

• Colour: Silver

• Model Number: BB-ES300