Shimano ES51 Octalink BB, 68mm x 113mm

Shimano ES51 Octalink bottom bracket, in 68mm British Standard thread, with a 113mm axle length.

• Splined bottom bracket for use with Shimano Octalink chainsets
• Oversize BB spindle - large 22 mm 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
• BBES51B13