Crossbars serve as the foundation for mounting roof-mounted equipment such as cargo boxes, bike racks, ski carriers, and roof tents. Important Note: Do not drive at high speeds, as wind resistance will increase significantly, which may exceed the maximum load capacity of the crossbars. This set of crossbars consists of one longer and one shorter bar. The longer one should be installed at the front of the vehicle. cross bars fit for Factory Rails They effectively expand cargo space, solving the problem of insufficient trunk capacity—ideal for long-distance trips or outdoor activities. Aerodynamic Crossbars (Airfoil/Droplet-shaped): Features an elliptical cross-sectional design to reduce wind noise and resistance, making them more suitable for high-speed driving. Mainly made of aluminum alloy, with a typical load capacity of around 75 kg. Static Load Capacity (weight-bearing when stationary): Usually more than twice the dynamic load capacity. Advantages: The airfoil-shaped crossbars minimize wind noise. Removable when unloaded to reduce energy consumption. Precautions: Excessive speed may cause noticeable wind noise depending on the vehicle model. Secure loaded items with straps or anti-slip nets to prevent shaking. Product Material: Aluminum alloy + ABS plastic Package Contents: 1 pair of aluminum alloy crossbars, 1 hex wrench, 2 keys, 4 end caps, and 1 instruction manual.