SHIMANO BB-ES51 OCTALINK BOTTOM BRACKET 68mm Bike-Product In combination with the 11-42

In combination with the 11-42 tooth cassette

Suitable for: SPD-SL Pedals

Optimized carbon lay-up places high-tensile strength carbon fibre at the most crucial points

Security level: Sold Secure Diamond

SHIMANO BB-ES51 OCTALINK BOTTOM BRACKET 68mm Bike-Product In combination with the 11-42Shimano BB ES51 Bottom bracket with round hollow axle and multi toothing for Octalink cranksets. Suitable for frames with BSA thread (68mm). Compared the power transfer of OCTALINK with the conventional square taper spindle, the 8 splined OCTALINK interface that connects bottom bracket and crank set increases the strength and rigidity for entire assembly. Specification Model: BB ES51 BB Type: Octalink Threaded: BSA Threaded BB shell width: 68mm Axle