Shimano ES51 Bottom Bracket

Shimano Deore-quality splined bottom bracket.

• 22mm diameter hollow pipe billet spindle reduces weight, increases strength and rigidity.
• OCTALINK Splined Axle Crank Arm Interface.
• An 8-spline interface between the bottom bracket spindle and crank results in a more rigid, non-loosening crank assembly.
• Sealed Cartridge Assembly - maintenance-free sealed cartridge keeps out dirt, mud, water and allows bottom bracket to be installed quickly without adjustment.

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