Box Two Alloy External ENG Bottom Bracket 68/73mm Box/Praxis 30mm

Box Two External bottom brackets feature cold-forged and CNC-machined alloy cups dual-labyrinth bearing covers and precision sealed bearings. Only compatible with Box One M30 Box Two M30 or Praxis M30 cranksets TECH SPECSWidth68/73mm BB InterfaceENGSpindle