Description: Mainly made of durable steel.Single speed freewheel 12 design.Suitable for 1/2″ x 1/8″. Specification: Material: SteelOuter diameter: 53mmThread inner diameter: 34mmInner bore: 18mmThickness: 26mm Package Includes: 1 Piece 12T Single Speed Freewheel Bicycle Freewheel Freewheel Sprocket Freewheel 12T
