- Durable Aluminum Alloy Construction: Designed to fit most bicycles including road bikes, mountain bikes, and fat bikes. Please note: not compatible with kids' bikes or Trek Verve. Important: do not carry children directly on the rack. - Adjustable Dimensions: Shelf length of 55 cm and width of 14.5 cm; panel length of 35.5 cm and width of 14.5 cm. Fits seat tube diameters ranging from 2.2 to 3.3 cm (0.85 to 1.3 inches), making it suitable for various bike models. - Complete Installation Kit: Each package includes 1 rack body, 6 support bars, 7 screws, 2 rubber gaskets, 2 form gaskets, 1 reflector, installation instructions, an installation tool, and a keychain. If the installation tool is missing, please contact us for a reissue. - Convenient & Safe Design: The rack is easy to install using the included hexagon screwdriver. It features a red rear reflector lamp for enhanced visibility and safety during nighttime rides. - Versatile Usage: Perfect for attaching panniers, backpacks, or baskets, this rack is ideal for commuting, weekend rides, or grocery trips. - User-Friendly Installation: With simple instructions and all necessary tools included, you can quickly set up your rack and be ready to ride in no time. This bike rack combines practicality, safety, and compatibility, making it an essential accessory for cyclists seeking reliable storage solutions.