Description: High Load Bearing Aluminum Alloy Material: Made of quality aluminum alloy, this bike cargo rack is lightweight. It boasts good load bearing capacity, making it suitable for carrying goods while cyclingThickened Tube Diameter Design: The rack's tube diameter is thickened (approximately 10.09 mm), enhancing its overall sturdiness and durability. It's not prone to breakage, ensuring long term stability with regular use. Suitable seat post diameter in 20mm-35mm, rear f ork diameter in 10mm-40mmTriangular Fixed Structure: Featuring a triangular fixed design, the rear bike rack offers strong stability and high pressure resistance. This ensures that the rack doesn't wobble or deform during ridesMultfunctional Use: The flat surface of the rack can be used to secure bags with ropes(included) or carry passengers or cargo, meeting different travel needs. The rack seat can be extended to accommodate different sizes of itemsCompatibility with Various Bikes: Equipped with a red rear reflector that enhances night time cycling safety by increasing visibility. This bicycle luggage carrieris suitable for regular bicycles and mountain bikes, meeting different installation needs due to its wide applicability Specification: Material: Aluminum Alloy Size Chart: Rack Seat Length:37 cmx46 cm/14.57 inchx18.11 inch Package Includes: 1Bike Cargo Rack1 Cargo Strap Note: Please allow slightly errors 1-2cm differences due to manual measurement.