All tyres allow gas to travel through the sidewall, which is why you need to regularly check your tyre pressures. Filling tyres with Nitrogen means that your tyre pressure will remain correct for longer because the rate at which Nitrogen passes out of the walls of your tyres is slower than oxygen.
Molecule Size: The physical size of a Nitrogen molecule is larger than that of compressed air. Nitrogen will escape from a tyre over a longer period of time than compressed air.
Low Tyre Pressures: Low tyre pressure creates more resistance to movement and therefore more energy is required to move your car.
Correct Tyre Pressure: Reduces the resistance to movement compared to an under-inflated tyre, and ensures optimum fuel efficiency.
Save Money, Reduce CO2: As Nitrogen helps to keep your tyre pressure correct for longer, it can help you increase your fuel efficiency for longer and therefore decrease fuel consumption. Also, as less energy is required it can help reduce your vehicles CO2 emissions.
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