Yosoo Health Gear 27.2mm to 30.4mm Seatpost Shim, Bike Seat Post Shim, Bike Seatpost Expander Sleeve, Black Aluminum Alloy Bicycle Seatpost Tube Adapter for Mountain Bike Road Bike

Features: - Made of full CNC precision machining aluminum alloy, anti-slip, light weight and durable. - Easy to install and remove, convenient for you to use. - With this seat post tube adapter, you can change the bicycle seat tube to the size you want. - Suitable for MTB bike, mountain bike, road bike, etc. - Please check the outer diameter of your bicycle seat tube. Measure the inner diameter of the old clamp. Or measure the outside diameter of the seat tube. Then make the right choice Specification: Material: Aluminum Alloy Color: black Options: 27.2mm to 28.6mm, 27.2mm to 30mm, 27.2mm to 30.4mm, 27.2mm to 30.8mm, 27.2mm to 31.6mm, 27.2mm to 33.9mm Size/ Length/ Weight 27.2mm to 28.6mm/60mm/2.36inch/13g 27.2mm to 30mm/60mm/2.36inch/22g 27.2mm to 30.4mm/60mm/2.36inch/29g 27.2mm to 30.8mm/60mm/2.36inch/25g 27.2mm to 31.6mm/60mm/2.36inch/37g 27.2mm to 33.9mm/60mm/2.36inch/54g Package list: 1 * Bike Seat Post Tube Adapter