✔✔Design with high quality aluminum alloy and quick release. Fits V-brake and Disc brake bike; For fat bike, road bike, mountain bike,etc. (Kids' bike and Trek Verve can not be used) ★★★Easy to install: Refer to the installation video of this product on Amazon, it will make your installation easier and less error-prone; ✔✔Shelf Length 22", Width 6"; Panel Length 14"; Width 6"；(Seat Tube Diameter0.85-1.3") adjustable for kinds of bikes; ✔✔Weight limit: 180kg / 400Lbs ; ✔✔Includes Red Rear Reflector Lamp and Elastic Cords, which can make you safer to riding at night and keep your luggage secure.