How to Check Your Tyres: Tread, Pressure & Safety
If you're driving a vehicle, you're legally responsible for making sure the tyres are in safe working order — even if you don't own the car.
Before you set off, here’s how to check your tyres properly.
Check Tyre Tread Depth
Using the tyre scanner in the Vixa app, check your tyres for tread depth and visible damage.
The legal minimum tread depth in the UK is 1.6mm across the central three-quarters of the tyre.
However, grip on the road begins to reduce from around 3mm. In wet or wintry weather — or before a long journey — you may want to replace your tyres before they reach the legal limit.
Check for Tyre Damage
After scanning the tyres:
Run your hand over the tyre surface and sidewalls (as far as you can safely reach).
Feel for cuts, bulges, cracks or embedded objects.
Any unusual damage should be inspected by a professional before driving long distances.
How to Check Tyre Pressure
Correct tyre pressure improves:
Road safety
Handling
Fuel efficiency
Tyre lifespan
Most modern cars display a warning if tyre pressure drops too low. If yours doesn’t, aim to check it every couple of weeks.
Some garages and tyre chains offer free pressure checks. If you prefer to do it yourself, follow these steps.
Step 1: Check Your Recommended PSI
Check your vehicle handbook for the correct tyre pressure (PSI – pounds per square inch).
You may also find this information:
Inside the fuel filler flap
On the edge of the driver’s door
On a sticker inside the vehicle
Step 2: Find a Fuel Station Air Pump
Most UK fuel stations have an “Air” facility where you can check and inflate tyres.
Step 3: Make Sure Tyres Are Cold
Tyre pressure increases as tyres heat up.
If you check pressure when tyres are warm, the reading may be inaccurate.
Ideally, check tyre pressure when the car hasn’t been driven for a couple of hours.
Step 4: Use a Pressure Gauge
Remove the valve cap from one tyre.
Press the pressure gauge onto the valve stem until the hissing stops.
Record the reading.
Repeat for all tyres.
What to Do If Tyres Are Over-Inflated
Inside the valve stem is a small metal pin.
Press it gently with a screwdriver to release air.
Or lightly press the gauge onto the valve to let out small amounts of air.
Recheck the pressure until it reaches the recommended PSI.
What to Do If Tyres Are Under-Inflated
Attach the air compressor hose to the valve stem.
Inflate until the correct PSI is reached.
Some digital compressors allow you to set the desired pressure in advance. The compressor will stop automatically when the correct level is reached.
Quick Answers
What is the legal tyre tread depth in the UK?
The minimum legal tread depth is 1.6mm across the central three-quarters of the tyre.
How often should I check tyre pressure?
At least every two weeks and before long journeys.
Can low tyre pressure affect fuel efficiency?
Yes. Under-inflated tyres increase rolling resistance, which reduces fuel efficiency.
Is it illegal to drive with damaged tyres?
Yes. Drivers are legally responsible for ensuring tyres are safe and roadworthy.