ITEM NAME:Alloy 31.6mm Seatpost to 27.2mm Bicycle Seat Tube Sleeve Adapter-60mm Black Description: - Made of aluminium alloy - Inner diameter is 27.2mm/1.07inch, outer diameter is 31.6mm/1.24inch - Use this seatpost sleeve adapter ring, you can use 27.2mm seatpost on your 30.4/30.8/31.6mm bike seatpost - Please check your bike frame seat tube outside diameter. measure the inside diameter of your old clamp. - Or measure the outside diameter of your seat tube (on your bike frame). then make a right choice Specification: - Material: aluminium alloy - Color: Black - Inner diameter is 27.2mm/1.07inch - Outer diameter is 31.6mm/1.24inch - Length: 6cm/2.36inch Package Included: 1 Piece Seat Post Tube.Then make a right choice. Specification: - Material: aluminium alloy. - Color: Black.
