Shimano 7710 Dura-Ace Track Bottom Bracket – N/A

Precision engineered Shimano 7710 Dura-Ace Track Bottom Bracket uses Shimano's Octalink splined system. 22mm diameter chrome-moly hollow pipe billet axle reduces weight. Splined interface provides a more rigid crank assembly compared to tapered counterparts. Compound bearing structure – ball and needle bearings support the spindle to reduce flex, Maintenance-free sealed cartridge design prevents corrosion and is easy to install, Average weight 173g.