Box Two Alloy External Sealed Bearing Bottom Bracket (24mm) (Blue) - BX-BB17000EX-BL
Box Two Alloy External Sealed Bearing Bottom Bracket (24mm) (Blue) - BX-BB17000EX-BL, Box Two 24mm Bottom Bracket Features: Box Two External bottom brackets feature cold-forged CNC-machined alloy cups, dual-labyrinth bearing covers and precision sealed bearings The perfect match to Box Three and Four cranks, and the ultimate upgrade to the budget BBs sold with most cranksets Specifications: Shell Width: 68/73mm Spindle Type: 24mm Thread: 1.37" x 24 TPI Weight: 105 g / 3.7oz