Box Two™ 24mm External bottom brackets feature cold-forged and 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-millimeter crank spindles and frames with 68 or 73 x BC 1.37-inch bottom bracket shells.
Material: 6061-T6 Aluminun Cups
Size: Fits BSA (Euro) shell type and 68/73mm width for 24mm spindle type and 1.37" x 24 TPI thread.
Color: Black, Blue & Red
Weight: 105 grams / 3.7 ounces
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