Features of the Shimano ES51 Deore Bottom Bracket 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 Shimano: About the brand All Shimano components are developed based on the Shimano system...
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