How Often Should You Check Your Tyre Pressure?

Tyre pressure is one of the most overlooked aspects of vehicle maintenance, yet it has a direct impact on your safety, fuel consumption, and tyre lifespan. The good news is that checking it takes less than five minutes — and it could save you from a blowout on the motorway.

How Often Should You Check?

The general recommendation is to check your tyre pressures at least once a month and before any long journey. Tyres naturally lose pressure over time — roughly 1 to 2 PSI per month under normal conditions — so even if everything seems fine, pressure will slowly drop.

Temperature changes also affect tyre pressure. For every 10°C drop in temperature, tyre pressure decreases by about 1 to 2 PSI. This means that if you set your pressures in summer, they could be significantly low by the time winter arrives in Oxfordshire.

How to Check Your Tyre Pressure

Follow these steps for an accurate reading:

• Check when tyres are cold — ideally before driving or after the car has been stationary for at least two hours. Warm tyres give a higher reading, which can be misleading.
• Find your recommended pressure — this is usually shown on a sticker inside the driver's door frame, in the fuel filler cap, or in the vehicle handbook. It is given in PSI (pounds per square inch) or bar.
• Remove the valve cap and press the gauge firmly onto the valve stem.
• Read the measurement and compare it to the recommended figure.
• Inflate or deflate as needed. Most petrol station air machines let you set the desired pressure and will stop automatically.
• Replace the valve cap — this keeps dirt and moisture out of the valve.

What Happens with Underinflated Tyres

Running tyres below the recommended pressure is more common — and more dangerous — than most people realise:

• Increased stopping distances — less contact patch efficiency means reduced braking performance
• Higher fuel consumption — underinflated tyres create more rolling resistance, making the engine work harder
• Accelerated edge wear — the outer edges of the tread wear faster, reducing tyre life significantly
• Overheating risk — the flexing of an underinflated tyre generates excess heat, which can lead to a blowout at motorway speeds
• Poor handling — the car may feel sluggish, wander on straight roads, and respond slowly to steering inputs

What Happens with Overinflated Tyres

Too much pressure is also problematic:

• Reduced grip — the contact patch becomes smaller and more rounded, reducing traction especially in wet conditions
• Harsher ride — the tyre cannot absorb road imperfections as effectively
• Centre wear — the middle of the tread wears faster than the edges
• Increased vulnerability to damage — an overinflated tyre is more susceptible to damage from potholes and sharp objects

Front vs Rear Pressure

Many vehicles have different recommended pressures for the front and rear tyres. This is because front-wheel-drive cars carry more weight over the front axle due to the engine. Always check both the front and rear specifications — they are usually listed separately on the door sticker.

Do Not Forget the Spare

If your car has a spare tyre, check its pressure too. There is nothing worse than getting a flat, retrieving the spare, and discovering it is also flat. The spare should be checked every time you check your main tyres. The recommended pressure for space-saver spares is usually higher than for full-size tyres — typically around 60 PSI.

For drivers across Oxford and Oxfordshire, NN Mobile Tyres is always available if you need help with tyre pressure, inspections, or any tyre-related issue. We come to your location, so there is no need to queue at a garage.

Frequently Asked Questions

What PSI should my tyres be?

The correct PSI varies by vehicle, tyre size, and load. You will find the manufacturer's recommended pressure on a sticker inside the driver's door frame or in your vehicle handbook. Common passenger car pressures range from 28 to 36 PSI.

Can I use a TPMS instead of checking manually?

A Tyre Pressure Monitoring System is a helpful safety net, but it typically only alerts you when pressure drops significantly below the recommended level — often by 25% or more. Regular manual checks catch slow leaks and minor drops that a TPMS might not flag.

Does tyre pressure affect fuel consumption?

Yes, significantly. Studies show that tyres underinflated by just 10 PSI can increase fuel consumption by up to 2.5%. Over a year of driving, that adds up to a noticeable difference at the pump.

Need help? Call NN Mobile Tyres on 07362 638978 or WhatsApp us — we are available 24/7 across Oxfordshire.