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Why Nitrogen?

On August 25, 2011, in Nitrogen Tire Inflation, Proper Tire Pressure, by allisonmreilly
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nitrogen tire inflation

Why is nitrogen used for tire inflation, versus air and other gases?

We’ve talked a lot about nitrogen tire inflation. After all, that is what we’re all about. But, we need to answer the question of “Why Nitrogen?” Why use nitrogen and not helium, carbon, or argon? If the point of nitrogen tire inflation is to reduce the amount of oxygen in the tires, then why do we specifically need nitrogen to accomplish that?

Nitrogen molecules have a more difficult time escaping through the microscopic spaces that exist between a tire’s rubber molecules. Nitrogen is a “slow”, inert gas due to its nonreactive nature with many materials. However, oxygen is a “fast” active gas that reacts with many materials. This reaction is a process called “oxidation.”  Additionally, nitrogen is a dry gas that doesn’t support moisture while oxygen combined with hydrogen makes water (H2O). So, even though air is already 78% nitrogen, that 21% of oxygen is enough to do long-term damage to your tires. Again, nitrogen seems like the most natural fit for tire inflation, but is it really the best fit, or the only fit?

Well, nitrogen is a denser gas than oxygen (and helium and carbon), so that explains why it does a better job of maintaining tire pressure than regular air. Consumers can benefit from the more stable pressures, even more so than the fact that your tires are safer with proper tire pressure. The problem is that humidity (aka water) is a horrible thing to have inside a tire. Water, present as a vapor or even as a liquid in a tire, causes more of a pressure change with temperature swings than dry air does. It also promotes corrosion of the steel or aluminum rim.

However, humidity doesn’t get in there through oxygen and the elements. It gets in there through the regular air systems you find at gas stations. Popular Mechanics remarks that some gas stations don’t do a very good job of keeping the humidity out of their air system. If your tires go unchecked, they can accumulate a lot of water, varying the tire pressure even more so than simple temperature changes.
Nitrogen tire inflation provides a good fix for this. Any system that delivers pure nitrogen is also going to deliver dry nitrogen. Filling tires with nitrogen involves filling and purging several times in succession, diluting the concentration of oxygen in the tire. This will also remove any water.

Sure, filling your tires with nitrogen will cost a little money, since you need to have it specially done. We’ve demonstrated in a previous post that the practice is worth the money in the long run. But, why does it have to cost money? Aren’t air and gases free? Well, they are free to acquire, but it does take time and labor to acquire. You simply can’t just put it in a jar. Nitrogen and other gases have to go in special tanks so they can be used appropriately.

Which brings us to the question of why nitrogen for tire inflation over the other gases. As previously stated, it 78% of the air is nitrogen, making it an incredibly abundant gas. The third most abundant gas is argon, which makes up 0.93% of the world’s atmosphere. Can you imagine how much it would cost to fill your tires with argon!?! It would certainly be an exorbitant amount of money, since it would be difficult to acquire and it would take a long time to acquire enough to fill up some tires. Nitrogen is not only the best fit, but it works out nicely due to it’s large quantities and density to be much more affordable than using any other gas.

proper tire pressure, nitrogen tire inflation

With proper tire pressure and nitrogen tire inflation, you won’t end up like this guy!

According to the Rubber Manufacturing Association, 85% of motorists don’t know how to properly inflate their tires. This is bad news considering that we are right in the middle of summer travel season, and that it really only takes a few minutes to ensure proper tire pressure in all five of your tires (yes, you ought to include the spare)!

“Our partnership and efforts continue today because our job is not finished,” said Charles Cannon, RMA president and CEO in Autoweek. “Too many drivers fail to do one simple task every month that will reduce their safety risk and help our nation conserve valuable natural resources. Checking tire pressure takes just five minutes, and it’s worth every second.”

Here are a few guidelines to help you inflate a tire properly:

  1. Check the current tire pressure. It’s best to do this on a monthly basis, and before and after long trips.
  2. Perform the check when the tire is cold (so, not right after driving).
  3. Use a tire pressure gauge to read the pressure (duh!)
  4. Make sure to use the recommended pressure listed in your owner’s manual as a guideline. DO NOT go by the number listed on the sidewall.
  5. If your tire(s) is under inflated, fix this immediately. Under inflated tires reduce your fuel efficiency and are a safety hazard when driving.

All that may seem like a lot, and let’s face it, checking your tire pressure is something that’s easy to forget. If there was a way to maintain proper tire pressure for longer periods of time, then it wouldn’t be so troublesome to forget. Maybe it might be easier to remember because I have to remember to check my pressure fewer times during the year. Well, such a solution is achievable with nitrogen tire inflation!

Inflating your tires with nitrogen instead of regular air has been shown to extend the life of your tire, increase fuel efficiency, and maintain proper tire pressure longer. If you find that you have under inflated tires, there’s no need to deflate them entirely of regular air before making the switch to pure nitrogen. Nitrofleet99, a provider of nitrogen tire inflation systems, demonstrates that nitrogen tire inflation is a green technology that doesn’t require any changes to your vehicle, only a behavioral change in how you inflate your tires when you pull up to the gas station or auto repair shop.

So what’s a motorist to do if you don’t know how to inflate your tires properly? Inflate them with nitrogen! It’s better in the long run, for you and your vehicle.

proper tire pressure

Make sure to check your tire pressure on a regular basis.

An easy way to save money with the tough economic times and the rising gas prices is to take proper care of your vehicle. By keeping up with maintenance checks, your car will not only last longer but will also cost less in repairs and upkeep in the long run. One aspect of car care that cannot be forgotten is proper tire maintenance. This means rotating your tires every 6,000 miles, and checking your tire pressure every other time you fill up at the gas station.

About 54 percent of Americans drive on under-inflated tires. Under-inflated tires can lower gas mileage by 0.3% for every one psi, or pound per square inch, drop in all four tires. The Department of Energy estimates that 3.56 million gallons of gas are wasted each day because of incorrectly inflated tires and advises motorists that they can improve gas mileage by approximately 3.3% by keeping tires inflated to the proper pressure. The main reason why motorists save money by maintaining proper tire inflation is because tires that wear evenly last longer before needing repair or replacement. Because a typical tire may also lose 1 to 2 psi a month if not checked and adjusted, uninformed motorists may be heading faster toward tire replacement than necessary.

One way to stop this decline toward tire replacement is to keep your tires properly inflated longer with nitrogen tire inflation. Just top off your tires with nitrogen next time you are at the service station, or even the next time you check you tire pressure, and you’ll notice a difference. Nitrogen permeates tire walls up to 4 times slower than air, so with nitrogen, you’ll see the same 1 to 2 psi loss in pressure over a period of six months, instead of the regular one month with regular air.

Therefore, you save money on overall car maintenance, because that’s fewer times you have to replace them or get them filled. It’s still recommended to do your scheduled maintenance checks and tire rotations, but you’ll have safer, more fuel-efficient tires. If needing an excuse to get to the mechanic or service station, now is as good a time as any for a checkup, since the summer travel season is just getting started. Getting your car ready for warm-weather driving should start with having the service department check the vehicle to look for specific problems, including safety issues, that may need to be corrected. It’s also a good time for maintenance, such as an oil change.


proper tire pressure

A tire gauge is just one of many tools that a woman can use to keep her tire pressure in check.

Women are becoming a huge part of the automobile market. In the United States, women buy 68 percent of new cars and 65 percent of new tires. Sixty-five percent of women take their own vehicles to a repair shop for service, although, some repair industry experts estimate that the average may actually be closer to 80 percent. With all this in mind, it’s only fair, and good business, to include women in on information regarding proper vehicle maintenance.

Checking your tire pressure to make sure that the tires are inflated properly is one of those key aspects of proper vehicle maintenance. Investing just a few minutes on a regular basis in performing this simple task can increase your road safety, lengthen the life of your tires and significantly improve your fuel efficiency. Sure, you can get this done when you visit the repair shop, or taking the time to invest those extra few minutes. But, there’s a way to keep them properly inflated that would require less time and less checking: nitrogen tire inflation.

Nitrogen tire inflation is an excellent choice for busy women who don’t have the time to visit the repair shop, or are swamped enough with all the other things that need to be done that asking for a few extra minutes is a tough ask. Studies have found that a tire filled with nitrogen stays at the proper tire pressure three to four times longer than regular air, meaning you can worry less about your tires. You also don’t have to remove all the air from the tire before using nitrogen, so simply top off your tires with nitrogen when you do visit the repair shop (if your repair shop offers the service), and you’ll be on your way. Proper tire pressure is also the SINGLE most important factor to increasing tire life, so nitrogen tire inflation saves time and money in the long run. What a deal!

According to Women’s Health, only one percent of women check their tire pressure before a long trip, increasing the chance that we girls get in an accident in our last attempt to celebrate the summer. If you are planning a road trip this summer, then now is as good a time as any to check your tire pressure and try nitrogen tire inflation for the first time. For more information about inflating your tires with nitrogen, check out Nitrofleet99.

proper tire pressure

Don’t forget to check the tire pressure of your spare tire as well as your regular four.

With Memorial Day weekend  just around the corner, AAA projects that over 30 million Americans will travel during those three days alone. For the entire summer travel season, which runs from Memorial Day weekend to Labor Day, the organization estimates that 8.7 million motorists will get stranded on the roadways. Don’t be one of them by making sure all five of your tires are properly inflated.

“Roughly 1.2 million drivers will call AAA for help with a flat tire during the summer travel season, and many of those problems could be avoided by inspecting the tires before hitting the road,” said John Nielsen, AAA Director of Auto Repair, Buying Services and Consumer Information. “Tire inspections are simple to perform. The only tools needed are a quarter and a tire pressure gauge.” Nielsen further explained that 85 percent of drivers “do not know how to properly inflate their tires, and more than half of all cars on the road have at least one under-inflated tire.”

While we can’t prevent every possible disaster that can happen on the road, we can at least make sure our tires are properly inflated and stay that way throughout the summer. The best way to do that is to utilize nitrogen tire inflation. Nitrogen tire inflation is simply filling up your tires (or topping them off) with nitrogen instead of air. Nitrogen enables more stable tire pressure for longer periods of time, thereby reducing the chances for a blowout. That’s good news if you’re planning to drive at some point during the travel season.

Properly inflated tires also can reduce fuel costs during a trip. The Department of Energy reports that correctly inflating all four tires can improve fuel economy by up to three percent, which is equivalent to as much as to 12 cents per gallon. As rising gas prices are doing little to keep Americans at home this summer, any and every way to save gas money is a good idea.

So, where can you go to get your tires inflated with nitrogen? Is this a service you can just ask for at your local mechanic? Well, not yet. But, a recommended dealer of these hybrid tires is Nitrofleet99. Keep in mind that it’s not necessary for you to remove all the air from your tire before seeing the benefits of nitrogen. You can still just top your tires off with nitrogen to keep them properly inflated.

Truth: Number listed shows maximum pressure allowed for that tire

proper tire pressure

Sidewall pressure is NOT the recommended pressure of operation. Credit: AGCO Automotive

The government estimates that only nine percent of vehicles have four properly inflated tires, so it’s time to clear up a myth or two about tire inflation. If you’re unsure about how to determine proper tire inflation for your tires, then here’s one piece of advice: DO NOT go by the number on the sidewall.

Sidewall tire markings (shown left) are found around the circumference of a tire, indicating everything from the brand and the wheel diameter to the load index, speed rating, tread wear, and traction. The pressure label (circled in red) does not indicate the manufacturer’s recommended tire inflation pressure, nor does it indicate the proper air pressure based on the vehicle the tire is mounted on. The number is the maximum pressure allowed for that tire. For the recommended tire inflation pressure, check the label located on the driver’s door or the owner’s manual.

Properly inflated tires can improve fuel efficiency by 3.3 percent and save $.06 a gallon at the pump. Approximately 1.2 billion gallons of fuel are wasted each year by motorists driving on under inflated tires. The National Highway Traffic Safety Administration estimates that under inflated tires contribute to more than 600 fatalities and 33,000 injuries each year.

All this information and statistical data may be a lot to take in, so on easy way to maintain proper tire pressure longer is with nitrogen tire inflation. Nitrogen tire inflation is exactly what the name says: putting nitrogen into your tires instead of air. Studies have shown that this method of tire inflation maintains proper tire pressure longer than regular air, and keeps them in better health for a longer period of time. Who says we have to change the entire car to improve safety and fuel efficiency? Why not do just one thing differently?

To learn more about nitrogen tire inflation and finding a station near you, check out Nitrofleet99. Don’t worry if you’ve never done this before, as it’s not necessary for you to remove all the air from your tires before inflating them with nitrogen.


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