Shimano ES300 Bottom Bracket Octalink Splined 68mm Various sizes to choose from 

 Sizes to choose from  113mm, 118mm, 121mm or 126mm

Road OR MTB

Splined bottom bracket for use with Shimano Octalink chainsets

Oversize BB spindle - large 22 mm diameter hollow cold forged chrome-moly pipe billet spindle reduces weight, increases strength and rigidity

Octalink splined axle/crank arm interface - results in more rigid crank assembly compared to square tapered spindle

Sealed cartridge assembly with oversize ball bearings - maintenance-free high efficiency rubber seals keep out dirt, mud and water

Cartridge design allows easy installation without adjustment

We recommend that a trained mechanic fits this item

 boxed