Feature:1. All-aluminum alloy crankset, integrated processing and forming, crankset protection and crankset integration.2. Aluminium alloy material, high strength, durable, and sturdy.3. Removable hollow crankset, provide good usage experience.4. Wonderful accessory for bicycle usage.5. 3 different types for you to choose, meet your different needs.Spec:Condition: 100% Brand NewItem Type: Integration CranksetMaterial: aluminium alloyColor: blackOptional type: 45T, 47T, 53TFeatures: polishing process, hollow typeStructure: Removable hollow cranksetPackage List:1 x Integration Crankset1 x Single Speed Hollow 1 x Hollow crankNote:Please make sure that the BCD of the crankset is 130mm. BCD is a circle surrounded by 5 holes of the crank, and the diameter of this circle is the distance from the position of the crank hole to the center of the crank is 65mm.(Note the distance on the plane on the side of the crankset)