Going on a trip with more luggage often forces you to look for additional space and, for many drivers, a luggage rack seems like the ideal solution. However, before installing one, it is worth keeping in mind that this accessory can affect fuel consumption more than many imagine.

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The explanation is simple. Any element that protrudes from the bodywork modifies the way air circulates around the vehicle.

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This greater resistance means that the engine must work harder to maintain speed, which ends up being reflected in greater fuel consumption. The weight of the load also influences, although its impact is usually less compared to the aerodynamic effect.

Roof racks affect the most

The bars and boxes installed on the roof are the most popular alternatives for transporting suitcases, bicycles or sports equipment. However, they are also the ones that generate the greatest impact on efficiency.

Various tests show that an empty roof rack can increase fuel consumption by around 2%. That figure increases when carrying large objects that offer more resistance to the wind.

The results are even more evident in some vehicles. Tests conducted with a Toyota RAV4 and a Nissan Altima revealed that carrying two bicycles on the roof reduced fuel efficiency by about 12% in the SUV and up to 25% in the sedan. This shows that shorter cars tend to suffer more from aerodynamic alterations.

The rear alternative is more efficient

Roof racks that attach to the trailer hitch often become a more favorable option for those looking to reduce the impact on consumption.

By being located behind the vehicle, they remain in an area where the air flow is already altered by the bodywork itself. Thanks to this, the increase in fuel consumption is usually between 1% and 3% when traveling empty.

Even loaded they maintain an advantage over roof systems. In available tests, the increase in consumption typically does not exceed a range of 10% to 15%, even in demanding scenarios.

Some recommendations to spend less

Those who use a roof rack occasionally can easily reduce consumption by removing it when the trip is over. Even if it is empty, it continues to generate air resistance.

It is also advisable to opt for more aerodynamic designs, distribute weight correctly and avoid carrying unnecessary objects. If the vehicle has a tow hitch, a rear luggage rack usually represents a more efficient alternative for most journeys.

Is it worth installing one?

The answer will depend on the needs of each driver. If the goal is to gain space for vacations, outdoor activities or transport additional luggage, a luggage rack is still a very useful accessory.

Of course, knowing how consumption affects allows you to make a better decision. Roof models offer greater versatility for certain bulky items, while rear options help reduce the impact on vehicle efficiency and, in the long term, can represent significant fuel savings.