• Shimano ES51 Octalink Bottom Bracket

        • $27.99 27.99
        • RRP $31.99
        • Save 13%
    • Select Colour
      Select Option
      English Thread
      Italian Thread
      Select Size
      68 x 113mm
      68 x 118mm
      68 x 121mm
      70 x 118mm
      73 x 113mm
      73 x 118mm

Shimano ES51 Octalink 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

A 2 year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).

Buy Shimano Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.

  • Delivery cost $9.99
  • Delivery toUnited States of America
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or fitted.

    More information on returns
  • Pay by Bank Transfer, PayPal or Card


  • Colour: Silver
  • Size: 68 x 121mm, 70 x 118mm, 68 x 113mm, 68 x 118mm, 73 x 113mm, 73 x 118mm
  • Option: English Thread, Italian Thread

Bottom Brackets Buying Guide

  • We've got everything you need to know in our buying guide.

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