
- Box Two™ External bottom brackets feature cold-forged and 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
- Shell: 68/73mm
- Interface: ENG
- Spindle Type: Shimano HTII 24mm
- Cup Material: 6061-T6
- Weight: 105g
