MonkeyJack 60mm Shim Adapter - Convert 27.2mm Seatpost to 31.6/30.8/30.4mm Bike Tube - Diameter 30.4mm/1.20inch

Description: - Made of aluminium alloy - Inner diameter is 27.2mm/1.07inch, 3 type of outer diameter to choose - 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: 1 Piece Seat Post Tube