1. Quality Material: Crafted from aluminum alloy, offering exceptional corrosion resistance, waterproof performance, and robust durability. Measuring 34 cm in length and 12 cm in width, it is compatible with various models, including mountain bikes and road bikes, with a diameter of 31.8 mm or less. 2. Strong Load Capacity: This bicycle luggage rack supports a load of up to 8 kg, allowing you to securely carry tents, sleeping bags, food, and other essentials for a safe and enjoyable cycling trip. Note: When carrying heavy loads, the bracket may tilt downward due to compression, which can be mitigated by adjusting the bracket length. 3. Easy Installation: Featuring a quickrelease design, our product can be effortlessly installed on bicycle seat posts without the need for tools. 4. Flexible Adjustment: Equipped with two hex screws at the base, the luggage rack allows for length adjustment to fit different bicycle sizes. Ensure the screws are tightly fastened during installation to prevent movement caused by vibrations while riding.