Shimano BB-ES51 Octalink V2 Bottom Bracket (68mm x 121mm)

Up for sale is a reliable Shimano BB-ES51 bottom bracket. This uses the secure Octalink V2 splined interface. It offers a much stiffer and stronger connection than older square taper spindles.

This specific size (68mm shell width and 121mm spindle length) is perfect for standard English-threaded bike frames. It is a common fit for vintage and classic mountain bikes or hybrid bikes using older Shimano Deore LX, Deore, or Alivio triple cranksets.