BOX TWO aluminum bottom bracket 24mm 68/73mm

Box Two™ 24mm external bottom brackets feature cold-forged and CNC-machined alloy cups, double-maze bearing covers and precision sealed bearings. They are the perfect complement to Box Three™, Four™ cranksets, and the ultimate upgrade from the budget bottom brackets sold with most bottom brackets. Box Two™ 24mm external bottom brackets are designed to fit all 24mm bottom brackets and frames with 68 or 73mm bottom brackets.