How to Change a Flat Tyre Safely

Knowing how to change a flat tyre is a useful skill, but only if the situation allows you to do it safely. On a quiet, level side road or in a car park, it is a manageable job. On a motorway, a busy A-road or a soft verge, it is often safer to wait for help. This guide walks you through the process step by step, from deciding whether to do it yourself to tightening the nuts at the end. Always check your owner’s manual first: jack positions, wheel nut torque and spare wheel details differ between vehicles.

Decide: change it yourself or call for help?

Do not change the wheel yourself if:

• You are on a motorway, a hard shoulder, a smart motorway emergency area or a busy fast road.
• The ground is soft, sloping or uneven.
• It is dark, foggy or very wet and you cannot be seen.
• You do not have a spare wheel, a jack, a wheel brace or the locking wheel nut key.
• You or your passengers are vulnerable, injured or unwell, or you do not feel physically able.
• The tyre is badly damaged with a sidewall tear, or the wheel itself is bent.
• You are unsure about any step.

In these cases, get everyone to safety and call your breakdown provider. Waiting is not a failure; it is often the best decision.

What you need

Check that you have:

• Spare wheel (or a space-saver temporary wheel), properly inflated.
• Jack suited to your vehicle.
• Wheel brace (wrench) that fits the wheel nuts or bolts.
• Locking wheel nut key, if your wheels have locking nuts.
• Owner’s manual, to find jacking points and any specific instructions.
• Torch, gloves and high-visibility clothing.
• Hazard warning triangle, if appropriate and safe to place.

Many modern cars have a sealant and inflator kit instead of a spare. Follow its instructions exactly, treat the result as temporary and have the tyre inspected at once.

Step 1: Find a safe place to stop

As soon as you realise you have a puncture, do not brake hard or turn the wheel sharply. Hold the steering wheel firmly, ease off the accelerator and gently slow down.

• Look for a flat, firm and straight surface, away from traffic: a lay-by, car park or quiet side road.
• It is better to drive slowly for a short distance on a flat tyre to reach a safe place than to stop on a dangerous section of road. You may damage the tyre or wheel, but safety matters more.

Step 2: Make the vehicle safe

1. Switch on hazard lights.
2. Apply the handbrake (or electronic parking brake) firmly.
3. Put a manual car in first or reverse gear, or an automatic in Park.
4. Switch off the engine.
5. Ask passengers to leave the vehicle and wait somewhere safe, away from traffic, ideally behind a barrier or on a verge. Keep children and pets under control.
6. If it is safe, place wheel chocks against the wheel diagonally opposite the flat to prevent rolling.
7. Put on your high-visibility clothing.

Step 3: Prepare the spare and tools

Open the boot and find the spare wheel, jack and brace, which are usually under the boot floor. Lay them out on the ground near the flat wheel. Check the spare:

• Is it inflated? If a pressure gauge is available, check it matches what the manual or sticker advises.
• Is it a temporary space-saver? These usually have speed and distance limits printed on them. Read the label.

Step 4: Loosen the wheel nuts first

Do this before lifting the car, while the wheel is still on the ground and cannot spin.

1. If there is a wheel trim or hubcap, remove it. Some have a special tool; others pull off by hand.
2. If you have locking nuts, fit the key into the locking nut and remove it first.
3. Fit the wheel brace onto each nut. Turn anticlockwise to loosen. You may have to use some force; stand on the brace or use your body weight if you need to, carefully.
4. Loosen each nut by about half a turn. Do not remove them yet.

Wheel nuts can be very tight, especially if they were fitted with a power tool. If you cannot loosen them safely, stop and call for help.

Step 5: Position the jack and lift the car

1. Check your manual for the jacking point. It is usually a reinforced notch on the sill (the strip of metal beneath the door) near the wheel you are changing. Never jack the car under the floor panel, suspension or plastic trim.
2. Place the jack on firm, level ground. On soft ground, put a firm board under the jack.
3. Raise the jack until it makes contact with the jacking point, making sure it sits correctly.
4. Continue raising the car until the flat tyre is just clear of the ground and there is enough space for the inflated spare to fit on.
5. Never put any part of your body under the car when it is on a jack. A jack is not designed to support a vehicle for working underneath. If the car slips, move away quickly.

Step 6: Remove the flat wheel

1. Fully unscrew the loosened nuts and put them in a safe place, such as a hubcap or your pocket. Do not let them roll away.
2. Grip the tyre with both hands and pull the wheel toward you, off the hub.
3. Lay the flat tyre flat on the ground to avoid rolling away, or place it in the boot if it fits.

Step 7: Fit the spare wheel

1. Line up the spare with the wheel studs or bolt holes. If the car has studs, hold the wheel and slide it onto them. With bolt holes, line up one hole and insert a nut or bolt to hold it.
2. Check the direction. Some tyres are directional, with an arrow on the sidewall showing rotation direction. Space-savers are usually not directional, but check.
3. Push the wheel fully onto the hub.
4. Hand-tighten the nuts, starting with those at the top, until they are snug. Use a star pattern (opposite nuts in turn) when tightening to seat the wheel evenly.

Step 8: Lower the car and tighten

1. Lower the car slowly until the tyre touches the ground but the car’s weight is not fully down.
2. Tighten the nuts firmly with the wheel brace in a star pattern.
3. Lower the car fully and remove the jack.
4. Tighten the nuts again in a star pattern, using firm steady force.

Step 9: Pack up and check

• Put the flat wheel, jack and tools back in the boot, securely.
• Check the spare’s pressure at the first opportunity, ideally at a garage or with a pressure gauge.
• If the spare is a temporary space-saver, drive slowly and carefully, observe the speed and distance limits, and replace it with a proper tyre as soon as possible.
• Retighten the wheel nuts after a short drive of about 25 to 50 miles if the manufacturer or a tyre specialist recommends it.

After the change

Take the flat tyre to a tyre specialist. Sidewall damage and large cuts usually cannot be repaired, and the decision belongs to the professional, not to you at the roadside.

How to Prepare a Breakdown Kit for Your Car

FAQs

How long can I drive on a space-saver wheel?
Only a limited distance at a limited speed, as printed on the wheel and in the owner’s manual. Replace it with a standard tyre as soon as you can.

What if I cannot loosen the wheel nuts?
Do not force it dangerously. Check you are turning anticlockwise and using the correct brace. If they remain stuck, call for help.

Can a punctured tyre always be repaired?
No. A tyre specialist decides, and sidewall damage usually rules repair out.

Conclusion

Changing a tyre is straightforward on flat, firm ground with the right tools, and risky anywhere else. Park safely, loosen the nuts before lifting, jack only at the right points, tighten in a star pattern and check the spare’s pressure. When in doubt, call for help.