Shimano BB-ES300 Acera Octalink Bottom Bracket (73-113mm)

Shimano BB-ES300 Octalink bottom bracket - for MTB and Touring

The Shimano BB-ES300 Octalink bottom bracket with 8-speed gears fits MTB and touring cranks installed in BSA bottom brackets with 68 or 73 mm shell width. Compared to its predecessor the BB-ES25, it can save up to 25 grams of weight. This is the standard version, which is not compatible with E-Type or chain cases.

Compatibility:
Octalink crank arms with eight-speed splines for longer grooves (Octalink MTB)

Key Features

• Compatibility: Octalink MTB crank arms with eight-speed splines

• Weight Savings: 26g lighter than BB-ES25

• Construction: Hollow and reinforced ribs for stiffness and strength

• Installation: Fast, precise, and reliable

• Chainline Control: Optimized for stable chain fixation

• Performance: Efficient power transmission

• Design: Standard version, not compatible with E-Type or chain cases

Product Specifications

• Model: BB-ES300

• Type: Octalink Bottom Bracket

• Shell Width: 68-73 mm

• Speed Compatibility: 8-speed

• Weight Reduction: 26 g vs BB-ES25

• Material: Reinforced hollow construction

• Technology: Shimano Octalink

• Intended Use: MTB, Touring

• Installation Type: BSA threaded

• Chainline: Optimized for precise alignment

Performance & Durability

• Rigidity: Octalink 8-tooth contact surface increases stiffness

• Load Capacity: Enhanced for off-road and touring demands

• Durable Design: Reinforced ribs prevent deformation under heavy loads

• Lightweight: Hollow construction reduces weight without compromising strength

• Reliable: Maintains stable performance over long rides and rough terrain

Why Choose This Product

• High Efficiency: Stiff construction ensures maximum power transfer

• Weight Advantage: Lightweight design enhances bike handling

• Precision Fit: Perfect chainline control for smooth operation

• Durable Build: Robust construction withstands demanding MTB and touring use

• Easy Upgrade: Compatible with most 8-speed Octalink MTB cranksets

In the Box

• Shimano BB-ES300 Bottom Bracket

• Installation instructions