Overview Product Description Bones 100 Wheels Set #12 v4 Set Black White Orange 51mm Bones 100s Wheels Bones 100s V4 OG #12 Wheels Black 51mm 100a (Set of 4) Details: Diameter: 51mm Hardness: 100a Formula: SBA Color: Black Suggested Use: Street Surface: Treaded Click here to view our entire selection of these products