A roof rack increases the luggage capacity of a car and is used for transporting bulky objects such as bicycles on the car roof, all safely and securely without scratching or damaging your equipment. Roof racks must have high strength, should be flexible to use (bicycle racks, roof box, ski racks) and should generate low wind noise while driving. Data on their load capacity (roof load) can be seen in the car manual. Transporting gear on the roof means more room inside the car, it also means that you don’t have to sit next to a dirty tent or wet snowboard. When loading the car roof, the driver must keep in mind that the car's driving characteristics may change considerably depending on the weight of the load on the roof.