Feature: 1. High-Quality Materials: Made of premium aluminum alloy and stainless steel, the disc brake adapter is sturdy and has nice durability, wear resistant, and rust resistant. 2. Improved Brake Performance: Convert your old road bike's V-brakes to disc brakes to enhance braking performance and efficiency. 3. Enhanced Sensitivity: The upgraded disc brake system is more responsive than the originals brake system, providing strong braking power and shorter braking distances. 4. Easy Installation: Easy to install and use, the adapter is designed to upgrade your road bike's braking system and improve braking performance. 5. Compatibility Note: Please ensure compatibility with your bike frame before purchasing. Check the position of the rear hook on your frame and compare it to the sizes provided. If there is a significant difference, it is recommended not to purchase for avoiding installation issues. Specification: Color: Black/Red/Gold/Silver/Multicolor(optional) Material: Aluminum Alloy Item Size: 121 * 75 * 15mm/ 4.8 * 3.0 * 0.6in Item Weight: 122g/ 4.3oz Package Size: 135 * 90 * 20mm/ 5.3 * 3.5 * 0.8in Package Weight: 126g/ 4.4oz Package List: 1 * Disc Brake Adapter