Alloy Bike Seatpost Shim, 100mm Length Aluminum Bicycle Reducing Sleeve Seat Post Tube Adapter, Diameter Switch 25.4-27.2mm; 27.2-28.6/30.0/30.4/30.9/31.6mm; 30.9-31.6mm.

The BNB-ZGShim-Fu Seatpost Insert is a high-quality, lightweight, and durable solution for securing your seatpost on your mountain bike, road bike, or any other bicycle.

Made of 6061 aluminum alloy, this insert ensures safety and stability while providing easy installation and removal.

With a range of sizes available, you can find the perfect fit for your bike frame's seat tube diameter.

Don't compromise on comfort and security - choose the BNB-ZGShim-Fu Seatpost Insert today!