MonkeyJack MTB Bicycle Seat Post Shim Tube Sleeve Reducer 31.6/30.8/30.4mm to 27.2mm

Description: - Made of aluminium alloy. - Inner diameter is 27.2mm/1.07inch, outer diameter is 30.8mm/1.21inch. - Use this seatpost sleeve adapter ring, you can use 27.2mm seatpost on your 30.4/30.8/31.6mm bike seatpost. - Suit for MTB bike, mountain bike, road bike etc. - 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: 27.2mm/1.07inch - Outer diameter: 30.4mm/1.20inch; 30.8mm/1.21inch; 31.6mm/1.24inch - Length: 6cm/2.36inch Package Includes: 3 Pieces Seat Post Tube