Keskiö Shimano DURA-ACE BB-7710 Track BSA 68mm 109.5mm

Shimano BB-7710 Bottom bracket with round hollow axle and multi-toothing for the DURA-ACE Octalink v1 crankset. Suitable for frames with BSA thread (68 mm). Compared the power transfer of OCTALINK v1 with the conventional square taper spindle, the 8-splined OCTALINK v1 interface that connects bottom bracket and crank set increases the strength and rigidity for entire assembly. Reduced axle flexure ensured by needle and ball bearings.