Shimano BB-7710 Dura Ace Cartridge Bottom Bracket Set NJS (Octalink Type)
Shimano Dura Ace BB-7710 Track Bottom Bracket for FC-7710 track cranks.
Octalink axle profile with 109.5mm axle length. The big, hollow rolled 22mm-axle of the bottom bracket reduces weight. The Octalink axle profile offers a firm fit. Reduced axle flexure ensured by needle and ball bearings. Compatible with Dura Ace FC-7710 Track cranks.
Weight: approx. 173g (shell-width 68mm)
Frame type: BSA
Case width: 68mm
Bracket, length of axle: 109,5mm
Bracket, profile of axle: Octalink