Shimano ES51 Octalink V2 Bottom Bracket

Splined bottom bracket for use with Shimano Octalink chainsets.

• Oversize BB spindle - large 22mm diameter hollow pipe billet spindle reduces weight, increases strength and rigidity
• Octalink splined axle/crankarm interface -results in more rigid crank assembly compared to square tapered spindle
• ES51 has anti-corrosion treatment inside hollow spindle
• Sealed cartridge assembly - maintenance-free sealed cartridge keeps out dirt, mud and water
• Cartridge design allows easy installation without adjustment
• Aluminium adapter
• Average weight 262 grams