- 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
- MPN: BX-BB17000EX-BK
Specs
- Shell: 68/73mm
- Interface: ENG
- Spindle Type: Shimano HTII 24mm