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![New Study Finds That Roof Racks Are a Real Drag on U.S. Fuel Consumption - Scientific American Blog Network New Study Finds That Roof Racks Are a Real Drag on U.S. Fuel Consumption - Scientific American Blog Network](https://static.scientificamerican.com/blogs/cache/file/0CADE185-77C1-48FA-BA137E0ADFACB6D7.jpg)
New Study Finds That Roof Racks Are a Real Drag on U.S. Fuel Consumption - Scientific American Blog Network
![New Study Finds That Roof Racks Are a Real Drag on U.S. Fuel Consumption - Scientific American Blog Network New Study Finds That Roof Racks Are a Real Drag on U.S. Fuel Consumption - Scientific American Blog Network](https://blogs.scientificamerican.com/blogs/assets/plugged-in/File/Citroen_C3_Pluriel_Roof_Construction_with_Roof_Rack.jpg)
New Study Finds That Roof Racks Are a Real Drag on U.S. Fuel Consumption - Scientific American Blog Network
![Roof rack test: quantifying the aero penalty - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com Roof rack test: quantifying the aero penalty - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com](http://metrompg.com/posts/photos/roof-rack-chart-s.gif)