Box Two 24mm External bottom brackets feature cold-forged, CNC-machined alloy cups, dual-labyrinth bearing covers, and precision-sealed bearings. They are the perfect match to Box Three and Four cranks, and the ultimate upgrade to the budget BBs sold with most cranksets.
Box Two, 24mm External Bottom Brackets, are designed to fit all 24-millimetre crank spindles and frames with 68 or 73 x BC 1.37-inch BSA threaded bottom bracket shells.
- Compatibility: Box Three, Box Four, Shimano� HollowTech II, RaceFace� X-Type
- Material: 6061-T6 Aluminium cups with ABS plastic sleeve
- Shell Width: 68mm/73mm
- Spindle Type: 24mm
- Bearing Type: Stable outboard position Abec-5 sealed.
- Thread: BSA 1.37" x 24 TPI
- Weight: 105 grams/3.7 ounces
