ZTTO Aluminum Alloy + Stainless Steel Bicycle Disc Brake Adapter Fixed Seat Post Adapter - Black V-Brake to Disc Brake Conversion: Easily upgrade your older road bike equipped with V-brakes to a modern disc brake system for improved braking performance and control High-Quality Materials: Made from durable aluminum alloy and stainless steel,ensuring strength,corrosion resistance,and long-lasting use Lightweight Design: Weighing only 120g,this conversion mount adds minimal weight to your bike,maintaining a sleek and efficient riding experience Universal Fit: Designed to work with most road bikes,allowing you to adapt your existing bike to the superior stopping power of disc brakes Simple Installation: Easy to install,making the conversion process quick and hassle-free for both professionals and DIY enthusiasts Specifications: Material: Aluminum alloy + stainless steel Net weight: 120g Note: Not all road bike frames can be installed. Before purchasing,please confirm the position of the rear tail hook of your frame and whether the size of the triangular area on the plane is close to the size in the picture. If the difference is far,please do not buy it to avoid installation. (Non-universal product,please carefully confirm whether it can be used before purchasing.) Package included: 1 x Bicycle Disc Brake Adapter