Description: Made of reinforced aluminum alloy, tested load can up to 50kg. Adjustable main clamp fits most bike. 2 'M' shape side bars prevent frame pannier bag touching wheels. Support bar is flexible and telescopic, can quickly adjust the height. Scientific proportion design is more stable. Specification: Material: Aluminum Alloy. Main Rack Size(LxW): Approx. 22x7cm/8.66x2.76inch. Size and dimensions refer to pictures. Package Includes: 1 Set Bike Rack with Installation Accessories