SHIMANO BB-ES25 BOTTOM BRACKET 68 X 121mm OEM

Splined bottom bracket for use with Shimano Octalink chainsetsOversize BB spindle - large 22 mm diameter hollow cold forged chrome-moly pipe billet spindle reduces weight, increases strength and rigidityOctalink splined axle/crank arm interface - results in more rigid crank assembly compared to square tapered spindleSealed cartridge assembly with oversize ball bearings - maintenance-free high efficiency rubber seals keep out dirt, mud and waterCartridge design allows easy installation without adjustment
WITHOUT SCREWS