Shimano BB-5500 105 Octalink Bottom Bracket - Italian 70 x 109.5mm.

Please note that picture  4  is for illustration purpose and is to show an Octalink BB not represent any size.

• Splined bottom bracket designed for use with Shimano road Octalink crankset
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• Oversize BB spindle - large 22 mm diameter chrome-moly hollow pipe billet spindle reduces weight, increases strength and rigidity
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• Octalink splined axle/crank arm interface - results in a more rigid crank assembly compared to square tapered spindle
• Aluminium adapter
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• Maintenance-free sealed cartridge design prevents corrosion and is easy to instal
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• Average weight 250 g