- Durable Aluminum Alloy Construction: Designed for compatibility with most bicycles, including road bikes, mountain bikes, and fat tire bikes. Note: Not suitable for junior bikes or Trek Verve models. - Adjustable Frame Size: The frame body is adjustable to fit a range of bike sizes, ensuring versatility for various bicycle types. - Convenient Dimensions: Shelf dimensions are 55 cm in length and 14.5 cm in width; panel dimensions are 35.5 cm in length and 14.5 cm in width. Compatible with seat tube diameters of 2.2-3.3 cm (0.85-1.3 inches). - Easy Installation: Comes with all necessary tools and installation instructions for straightforward setup. The frame can be quickly mounted using a hex screwdriver. - Included Accessories: Package includes 1 frame body, 6 support rods, 7 screws, 2 rubber washers, 2 molded washers, 1 reflector, installation instructions, installation tools, and a keychain. If installation tools are missing, please contact us for a replacement. - Enhanced Safety Features: Equipped with a red rear reflector to improve visibility during night rides, ensuring a safer cycling experience. - Practical Applications: Ideal for attaching saddle bags, backpacks, or baskets, the bike rack provides extra storage for long rides, daily commutes, or weekend adventures. - Versatile Compatibility: With its adjustable design, this bike rack can support various cargo needs, making it an essential accessory for cyclists who require additional carrying capacity.