It has a distinctive shape that has been optimized using advanced computer simulation reducing the impact on fuel economy and providing a quiet ride.
Thule roof box fuel consumption.
Suggested it can be reduced by over a third the aerodynamics of the box and roof bars are key to reducing the negative impact but it s a.
Of course sticking an enormous roof box on the car can affect fuel consumption figures thule told driving that official mpg figures are likely to decrease by more than 5 but a study by whatcar.
5 9 l 100 km approx.
6 0 l 100 km approx.
It has a distinctive shape that has been optimised using advanced computer simulation reducing the impact on fuel economy and providing a quiet ride.
Roof box how much does fuel consumption rise.
30 4mpg two front windows a third open 30 3mpg roof bars and laden roofbox 30 2mpg two front windows totally open 29 7mpg four tyres.
Beyond that the two items tested with the least impact on gas mileage were the paddle board and thule luggage carrier both of which caused about a 19 percent decrease in fuel economy or 5 5.
With thule motion xt thule is setting a new standard for modern roof box design with a stylish silent and easy to use box that will make your car look even better.
Adding any rooftop carrier cargo box or ski rack doesn t come free.
30 5mpg astra s baseline fuel economy.
With thule motion xt thule is setting a new standard for modern roof box design with a stylish silent and easy to use box that will make your car look even better.
In fact it significantly cuts your highway mileage all the time it s installed whether there s weight up there or not.
Roof rack with thule dynamic 800 aerodynamic cargo box.
40 mpg roof mounted thule xtender 739 ski carrier with skis.
39 mpg thus the cargo box on the roof increased fuel consumption by about 5 compared to the baseline.
It s impossible to give an exact figure because it depends on so many factors but britain s biggest roof box manufacturer thule states that your mpg is unlikely to decrease by more than 5.
