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Facts On Maintaining Proper Tire Pressure


Saving lives – vehicle safety and performance 
Under-inflation is the leading cause of tire failure. Even if your tires look fine, they could be underinflated by as much as 20 per cent.
According to a recent study, about 50 per cent of the vehicles on the road in Canada have at least one tire that is either over or underinflated by more than 10 per cent. In fact, 10 per cent of all vehicles surveyed had at least one tire underinflated by 20 per cent.
When your tires don’t have the right amount of air, the sides flex, bend and build heat. Underinflated tires compromise your vehicle’s steering, braking and cornering abilities.
Operating a vehicle with just one tire underinflated by 8 PSI can reduce the life of the tire by 15,000 km.
Saving fuel and the environment 
Annually, 643 million litres of extra fuel are consumed by Canadian vehicles because of improper tire maintenance practices. As a result, over one million tonnes of carbon dioxide are unnecessarily released into the environment4.
Canadians dispose of 29 million used tires every year, which has a significant impact on landfills. Even modest improvements in extending tire life could have a significant positive impact on our environment as energy used to produce new tires emits harmful pollutants into the atmosphere.
Saving money 
Fuel consumption increases by one per cent for every five per cent of under-inflation. Operating a vehicle with just one tire under-inflated by eight PSI can reduce the life of the tire by 15,000 km and can increase the vehicle’s fuel consumption by four per cent. Example:
• If fuel costs $1.32 per litre and it takes approximately 9.1 litres per 100 km equals $12.01 per 100 km.
• Increasing fuel consumption by four per cent equals $12.47 per zero kilometres
• If you average 22,000 kilometres per year, you would save $100 annually ($2,642 versus $2,743) by keeping proper tire pressure
Maintaining proper tire pressure could save you approximately two weeks of fuel a year, enough to pay for one full set of tires over the average nine-year life of a vehicle.
Underinflation also reduces tire life. Driving with tires that are under-inflated by eight PSI will increase tire wear by 16 per cent (approximately 15,000 kilometres). This will hit your pocketbook as you will have to replace tires sooner than you would if they were properly maintained.
Tire Pressure Monitoring System 
TPMS will trigger the dashboard symbol to illuminate when one or more tires are under-inflated by 25 per cent.
TPMS improves your vehicle’s handling and stability, decreasing your chances of catastrophic tire failure and having an accident.
While not currently mandated, an estimated 70 per cent of new vehicles (model year 2007 and newer) sold in Canada are TPMS-equipped.
Starting in 2007, TPMS became a legislated feature on all passenger vehicles sold in the U.S.
Tips for Drivers: 
Get in the habit of manually checking your tire pressure at least once a month or before a long road trip. Even if your vehicle has TPMS installed, regular tire maintenance is the best way to increase your safety.
The best way to get the most accurate reading is to check your tire pressure before you drive, when the tire is cold.
To determine if your vehicle has TPMS, look for the TPMS symbol on the dashboard when you first turn your key to the on position. Consult your owner’s manual for more information.
When installing winter tires or buying new wheels, be sure to have TPMS sensors installed in the wheels. Failure to do this will make your TPMS inoperative.
Large temperature drops, usually during winter, can cause the low tire pressure warning to come on. Have a tire service centre properly check your tire pressure and TPMS if this happens.
TPMS batteries, expected to last between five and seven years (or approximately 140,000 to 160,000 kilometres per year), are encased and can’t be replaced. Since some of the first TPMS-equipped vehicles have now been on the road for more than five years, drivers will soon need to see TPMS specialists for maintenance. Once the battery dies, a new TPMS sensor must be installed.
When the TPMS illuminates on your dashboard, it means one or more of your tires may be at least 25 per cent below recommended inflation pressure. Pull over and check your tire pressure. Once checked, if the tires appear normal, proceed with caution to a tire service centre to have them properly inspected.
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