Will a roof box affect fuel efficiency?

Will a roof box affect fuel efficiency?

Installing any item on your roof, such as roof racks and a roofbox, will increase the aerodynamic drag, especially at higher speeds, which can lead to higher fuel consumption. The extent of the impact depends on several factors, including the size and shape of the roof box, how full it is, your driving speed, and the design of your vehicle.

If fuel efficiency is a concern, consider removing the roof box when it's not in use, or opt for a more aerodynamic, low-profile model.

Updated on: 15/09/2025