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

Manufacturer's Code: BBES300C13, BBES300C18, BBES300C21, BBES300C26

Barcodes: 4524667326373, 4524667326533, 4524667326496, 4524667326502

Shimano ES300 73mm Bottom Bracket

Features