BB-ES300 Bottom Bracket

Product Information

The Shimano BB-ES300 Octalink bottom bracket is a solid choice for upgrading or replacing your drivetrain, especially if you're looking for improved rigidity and efficient power transfer. This Octalink system stands out from traditional square taper designs by utilizing an 8-splined interface between the bottom bracket and crank, which significantly enhances strength and load capacity. It's a noticeable upgrade, offering a hollow construction for a stiff yet lightweight feel, perfect for MTB, touring, and city applications.

Notably, this model is up to 26 grams lighter than its predecessor, the BB-ES25, without compromising on durability, thanks to its robust construction with reinforced ribs. The cartridge design ensures a fast and precise installation, helping you maintain optimal chainline.

Features

• Octalink 8-splined interface for enhanced rigidity and load capacity
• Hollow construction for a stiff and lightweight design
• Robust construction with reinforced ribs for durability
• Up to 26g lighter than the BB-ES25 model
• Sealed cartridge assembly with oversize ball bearings
• Maintenance-free, high-efficiency rubber seals keep out dirt and water

Specs

• Application: All Mountain, Touring, City
• Type: BSA (English thread)
• Shell Width: 68 mm or 73 mm
• Axle Lengths: Available in 113mm, 118mm, 121mm, 126mm
• Axle Type: Octalink (MTB)
• Compatibility: Octalink crank arms with eight-speed splines (Octalink MTB)
• Bearings: Steel
• Axle Material: Steel
• Bottom Bracket Cup Material: Composite (left), Steel (right)