BOX Two Bottom Bracket BX-BB17000EX-BL

- Features cold-forged and CNC-machined alloy cups, dual-labyrinth bearing covers and precision sealed bearings\n- Designed to fit all 24-millimeter crank spindles and frames with 68 or 73 x BC 1.37-inch bottom bracket shells\n- Compatible with Box Three, Box Four, Shimano HollowTech II, and RaceFace X-Type\n- 3rd party web sales must be an Authorized Dealer