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When driving in the rain, it is
never really desirable to open your windows. When driving at high
speeds, it is especilly not recommended to have your windows open, as
this drastically changes the aerodynamics of your car. When you drive with your windows even slightly cracked open, the inside of your car essentially becomes a giant parachute, creating a massive amount of resistance due to air rushing in. What wind deflectors do is direct that air upwards and around your car, elimnating the wind resistance caused by open windows at high speeds. So now, you can have your window cracked open in the rain, or driving at high speeds, or both, while slightly improving the gas mileage on your car! Back to top |