Discover all towbar boxes in various sizes below. A towbar box offers several advantages over a roof box. The cargo box sits low to the ground, making loading and unloading much easier. Because there is nothing on the roof, you do not have to worry about the height of the vehicle when entering underground car parks or toll roads. But most importantly, your car remains streamlined and aerodynamic while driving. This especially important with electric vehicles to keep their driving range as high as possible. Discover the different types below.