MaintainlyHow often should you check your tire pressure?
Check tire pressure once a month. The commonly recommended range is monthly + before long trips. Under-inflated tires waste fuel, wear faster, and risk blowouts.
Tyres lose pressure even with no puncture: Michelin says up to 1 PSI every month, before you count temperature effects. A tyre can be well under pressure and still look normal, which is why this is a gauge job rather than a glance job.
Why does checking your tire pressure matter?
Under-inflated tires waste fuel, wear faster, and risk blowouts.
What happens if you skip checking your tire pressure?
Continental lists the effects of underinflation: heat build-up that can lead to structural failure or a blowout, heavy and sluggish steering, higher fuel use, and premature wear on the outer shoulders of the tread.
How do you do it?
- Check them cold. Before driving, or at least three hours after. Driving warms tyres and raises the pressure, which gives a false reading.
- Find the correct pressures. On the driver’s door jamb sticker, the fuel filler flap, or in the handbook. Not on the tyre sidewall, which shows the maximum the tyre can take rather than the right figure for your car.
- Check all four and the spare. The spare is the one everybody forgets, and it is the one you need when things have already gone wrong.
- Set to the loaded figure if relevant. Many cars list a higher pressure for full loads or towing. Use it when it applies.
- Look at the tread while you are down there. Check depth, and check for uneven wear that suggests alignment problems.
- Reset the TPMS if needed. Some systems relearn automatically, others need a reset procedure.
What does it take?
How do you know checking your tire pressure is overdue?
- The TPMS warning light, which under the US standard only has to come on once a tyre is 25 percent below the recommended pressure
- Wear concentrated on both shoulders, which indicates chronic underinflation
- Wear down the centre only, which indicates overinflation
- Fuel economy drifting worse with no other explanation
- Steering feeling heavy or the car wandering
What do people get wrong?
- Checking pressures when the tyres are hot after a drive, then letting air out to reach the placard figure, leaving them underinflated once cold
- Using the maximum pressure printed on the sidewall as a target
- Trusting a forecourt gauge without ever comparing it against your own
- Ignoring the spare until it is needed
What changes how often you need to do it?
- Pressure follows temperature: Continental puts the change at 1.6 PSI for every 10 degrees Celsius, so an autumn cold snap can take a tyre below the placard figure overnight
- Check before any long journey and when carrying a full load
- Nitrogen leaks out more slowly than air but does not remove the need to check
When should you stop and call someone?
A tyre that repeatedly loses pressure has a leak, a corroded rim or a failing valve. That needs a tyre shop rather than a monthly top-up.
Does this differ in the US, UK, Australia or Canada?
United States
Federal standard FMVSS 138 requires a tyre pressure monitoring system on cars and light trucks up to 10,000 pounds gross weight built on or after 1 September 2007. Pressures are in PSI and the door placard is the authority.
United Kingdom
The Highway Code says to check tyre pressures weekly, before a journey, when the tyres are cold. The MOT inspects the tyre pressure monitoring system on passenger cars first used on or after 1 January 2012, and a system that is malfunctioning or obviously not working is a major defect, which fails the test. Pressures are usually quoted in PSI or bar.
Australia
Placards and garage gauges do not always use the same unit, kPa or PSI, so check which one you are reading. Long distances at highway speed in high heat make correct pressure a safety matter: use the load and speed figures on the placard or in the handbook.
Canada
Transport Canada notes that tyre pressure goes down in the cold. On Continental’s figure of 1.6 PSI per 10 degrees Celsius, a 30 degree drop between autumn and midwinter takes close to 5 PSI out of every tyre, so set pressures at each changeover and check monthly through winter.
Frequently asked questions
Why does checking your tire pressure matter?
Under-inflated tires waste fuel, wear faster, and risk blowouts.
What happens if you skip checking your tire pressure?
Continental lists the effects of underinflation: heat build-up that can lead to structural failure or a blowout, heavy and sluggish steering, higher fuel use, and premature wear on the outer shoulders of the tread.
Does checking your tire pressure differ by country?
US PSI; UK/CA PSI or bar/kPa. Cold-weather pressure drops matter in CA/UK winters. AU: placards are in kPa while many garage gauges read PSI, so check which unit you are reading.
How we put this together
The figures, intervals and legal points on this page were checked against the sources listed below. The default interval and accepted range are the ones Maintainly uses in its task library. Costs and times are typical ranges and vary by region and by home. Your own manufacturer's instructions come first, and gas, electrical and structural work belongs with a qualified professional. How we research and write.
Sources
- Tire Pressure, Michelin. Checked 11 October 2026.
- Tire pressure, Continental Tires. Checked 11 October 2026.
- 49 CFR 571.138: Standard No. 138, Tire pressure monitoring systems, Legal Information Institute, Cornell Law School. Checked 11 October 2026.
- The Highway Code, Annex 6: Vehicle maintenance, safety and security, GOV.UK. Checked 11 October 2026.
- MOT inspection manual: cars and passenger vehicles, section 5: Axles, wheels, tyres and suspension, Driver and Vehicle Standards Agency. Checked 11 October 2026.
- Using winter tires, Transport Canada. Checked 11 October 2026.
Next steps
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