If you’ve been in the market for a new vehicle lately or gone in for a tire change, there’s a good chance you’ve been asked if you want your tires filled with nitrogen instead of compressed air. You might be wondering why. While the jury is still out on whether nitrogen is a greener option than air, there are some reasons to consider inflating tires with N versus O:

Stabilized tire pressure

Compressed air is comprised of 78 per cent nitrogen, 21 per cent oxygen and trace amounts of other gases. Proponents of nitrogen say that because its molecules are slightly larger than oxygen molecules, they’re less likely to make their way through the rubber in tires. The result? Less tire pressure loss.

Longer-lasting tires

Because oxygen and moisture degrade rubber tires, those filled with pure nitrogen are less likely to break down as quickly. Eliminate humidity inside a tire wall, and you have a tire that’s going to last. What’s more, water vapour inside a tire causes pressure changes as outside temperatures swing between summer highs and winter lows.

Some savings

Properly inflated tires result in a more fuel efficient ride. They also require less maintenance, saving vehicle owners some money.

Reasons for air

Not every car expert is convinced nitrogen is always the way to go.

1. Filling tires with nitrogen costs more than filling them with air, so any fuel savings could end up being offset.
2. You will probably not feel any true difference in handling or braking.
3. You can maintain constant air pressure by checking the air pressure regularly and refilling the tires for free.
4. Your neighbourhood mechanic may not offer it. Nitrogen is often available only through select dealers.

Whether you opt for nitrogen or air, well maintained tires help get better gas mileage and are the safest option, too. Check out more safety tips and find out about car insurance options from The Co-operators.