Getting a flat tyre is a frustrating but common part of driving. This guide provides clear, field-tested instructions on how to change a tire safely and efficiently, getting you back on the road without waiting for assistance. Learning this essential skill gives you confidence and control in a stressful situation. We'll cover everything from finding a safe spot to the final checks before you drive away, ensuring you can handle the job like a pro.
Fast Answer
- Park Safely: Find flat, stable ground away from traffic. Use hazard lights.
- Loosen Nuts: While the car is on the ground, slightly loosen the lug nuts.
- Jack Up: Use the correct jacking point to lift the vehicle.
- Swap Wheels: Remove the flat tyre and mount the spare.
- Lower & Tighten: Lower the car and fully tighten the lug nuts.
Before You Start
Preparation is the key to a safe and quick tyre change. Rushing this stage can lead to problems or injury. Take a few minutes to gather your tools and assess your surroundings before you even touch a lug nut. A calm, methodical approach is always the best one.
What You Need
- A fully inflated spare tyre. Check its condition and pressure before you rely on it.
- Vehicle jack. This is usually stored with the spare tyre.
- Lug wrench. This tool is used to remove the wheel nuts.
- Vehicle owner's manual. It contains critical information on jacking points and torque specifications.
- Wheel chocks. These prevent the car from rolling. A large stone or sturdy piece of wood can substitute in an emergency.
- Gloves. Wheels are dirty, and a good grip is important.
- A torch. Essential if you are working in low light.
- A reflective warning triangle. To alert other drivers of your presence.
- A small, flat piece of wood. To place under the jack for stability on soft ground.
Safety, Timing, or Context Checks
- Location, Location, Location: Your immediate priority is safety. Pull over to a location that is as far from moving traffic as possible. A level, solid surface like a car park or a lay-by is ideal. Avoid stopping on soft grass, loose gravel, or a steep incline.
- Make Yourself Visible: Turn on your vehicle's hazard warning lights immediately. If you have a reflective warning triangle, place it at least 45 metres (147 feet) behind your car to give other drivers ample warning.
- Check Your Spare: Before you begin, confirm your spare tyre is usable. A flat spare is a common and completely avoidable problem. If you find your spare is also flat, your only option is to call for roadside assistance.
Step-by-Step Instructions
Follow these steps in order. Do not skip any, especially the safety checks. Each action is designed to keep you and your vehicle secure throughout the process.
Secure the Vehicle
With your car parked safely, the handbrake on, and the engine off, the final step in securing it is to use wheel chocks. Place them on the opposite corner from the flat tyre to prevent any chance of rolling. For example, if your front left tyre is flat, place chocks behind the rear right wheel. If you don't have dedicated chocks, a couple of heavy rocks or sturdy pieces of wood pushed firmly against the tyre tread will work.
This step is non-negotiable. The forces involved in jacking a car can cause it to shift, and chocks are your primary defence against movement.
Prepare the Spare and Tools
Retrieve the spare tyre, jack, and lug wrench from your boot. Most cars store these under the boot floor. Place them on the ground near the flat tyre so they are within easy reach. If your wheel has a plastic hubcap or wheel cover, you'll need to remove it now. Most can be pried off using the flat end of the lug wrench. Some are held on by the lug nuts themselves and will come off when the wheel is removed.
Loosen the Lug Nuts (While on the Ground)
This is a critical step that many people get wrong. You must loosen the lug nuts before you lift the car with the jack. The weight of the car on the ground prevents the wheel from spinning as you apply force. Using the lug wrench, turn each nut approximately half a turn anti-clockwise. This is often summed up as "lefty-loosey, righty-tighty".
The nuts may be very tight. Position the wrench on a nut so the handle is horizontal, and use your body weight to push down with your foot. This gives you much more leverage than trying to pull up with your arms and reduces the risk of straining your back.
Jack Up the Vehicle
Consult your owner's manual to locate the correct jacking point for the flat tyre. This is not just any point on the car's underside. It's a specific, reinforced piece of the frame, usually a small notch or metal ridge just behind the front wheel or in front of the rear wheel. Placing the jack in the wrong spot can cause serious damage to your car's bodywork or create an unstable lift.
Position the jack under the specified point. If you are on soft ground like asphalt on a hot day or a soft verge, place a sturdy, flat piece of wood under the jack base to distribute the weight and prevent it from sinking. Slowly turn the jack's handle clockwise to raise the vehicle. Continue lifting until the flat tyre is about 6 inches (15 cm) clear of the ground. This provides enough space to remove the flat and mount the fully inflated spare.
Remove the Flat Tyre
Now that the car is in the air, you can finish unscrewing the lug nuts by hand. Place them in a safe spot, like your pocket or the upside-down hubcap, to avoid losing them in the grass. Once all the nuts are off, grip the tyre firmly with both hands and pull it straight toward you, off the threaded wheel studs.
For an extra layer of safety, slide the flat tyre on its side and place it on the ground under the car's frame, near the jack. In the unlikely event that the jack fails, the car will fall onto the old wheel rather than crashing to the ground, giving you space to get clear.
Mount the Spare Tyre
Lifting the spare tyre and aligning its holes with the wheel studs can be the most awkward part of the job. It's often easier to lift the wheel and align one of the top holes with a stud first. You can then rest the wheel on that stud and pivot it to align the rest of the holes. A useful technique is to sit on the ground and use your feet to help lift and position the wheel.
Push the spare tyre all the way onto the hub until it sits flush against the brake assembly. There should be no gap between the wheel and the mounting surface.
Hand-Tighten the Lug Nuts
With the spare tyre in place, take your lug nuts and screw them back on by hand. Tighten them until they are 'finger-tight'. It is vital to tighten them in a star pattern. This means tightening one nut, then the one opposite it, then another, then its opposite, and so on. For a five-stud wheel, you would trace the shape of a star. This technique ensures the wheel is pulled onto the hub evenly and sits correctly, preventing wobble.
Lower the Vehicle and Finish Tightening
First, remove the flat tyre from underneath the car. Now, carefully turn the jack handle anti-clockwise to lower the vehicle. Stop when the spare tyre is touching the ground but before the car's full weight is on it. With the tyre now unable to spin, use the lug wrench to fully tighten the nuts. Again, use the star pattern for this final tightening. You want them to be very tight. Use your body weight on the wrench to ensure they are secure.
Once you are satisfied the nuts are tight, lower the car completely, remove the jack, and give each nut one last check with the wrench for good measure.
Stow Your Gear and Check Tyre Pressure
The hard work is done. Place the flat tyre, jack, and all your tools back into the boot. If the hubcap fits the spare wheel, you can put it back on, but many space-saver spares do not accommodate them. Tidy up the area, remove your wheel chocks, and turn off your hazard lights.
Your final, crucial task is to drive carefully to the nearest petrol station and check the pressure of the spare tyre. Space-saver tyres often require a much higher pressure than standard tyres (e.g., 60 PSI). The correct pressure is written on the tyre's sidewall. Under-inflation is dangerous and can cause the spare to fail.
Quick Reference
| Situation | Use this | Why |
|---|---|---|
| Lug nuts are stuck tight | Body weight on the wrench | Provides significantly more torque than arm strength alone. |
| Vehicle is on soft ground | A flat plank of wood under the jack | Distributes the vehicle's weight and prevents the jack from sinking. |
| Unsure of the correct jacking point | The vehicle owner's manual | Using the wrong point can damage the car's frame or cause a dangerous slip. |
| Wheel is stuck on the hub | A firm kick to the tyre's sidewall | Corrosion can "glue" the wheel on. A sharp impact can break it free. |
Common Problems When You change a tire
Even with a good plan, you can run into trouble. Here are some common hurdles and how to clear them.
The Lug Nuts Won't Budge
This is the most frequent issue, usually caused by over-tightening at a garage or by corrosion. First, ensure you are turning the wrench anti-clockwise. Apply steady pressure with your foot rather than jumping on it, which can cause the wrench to slip. If it still won't move, a squirt of penetrating oil (like WD-40) on the threads can help, but you'll need to wait a few minutes for it to work. As a last resort, some drivers carry a 'breaker bar', which is a longer wrench that provides more leverage.
The Wheel is Seized to the Hub
Sometimes, even after removing all the lug nuts, the wheel remains firmly attached to the car due to rust. To break it loose, first double-check that all nuts are off. Then, give the tyre's rubber sidewall a few firm kicks with the heel of your shoe, rotating the wheel and kicking different spots. Avoid kicking the metal rim, as you could damage it. A few sharp impacts are usually enough to break the corrosion bond.
The Jack Seems Unstable or Sinks
If the jack looks like it's tilting or sinking as you raise the car, stop immediately and lower it. This almost always means the ground is not suitable. Either the ground is too soft, or it is not perfectly level. Reposition the car if possible. If not, find a solid, flat object like a plank of wood to place under the jack's base to create a stable platform.
Advanced Tips for how to change a tire
Once you've mastered the basics, these tips will make the process smoother and safer.
Use a Torque Wrench
While the supplied lug wrench will get the job done, a torque wrench is the professional's tool. It allows you to tighten the lug nuts to the exact specification recommended by your car's manufacturer (found in the owner's manual). This prevents damage from over-tightening and ensures the nuts are not dangerously loose. After changing a tyre, it's good practice to get the nuts checked with a torque wrench at a garage.
Maintain Your Equipment
Your spare tyre kit is emergency equipment. Check it twice a year. Ensure the spare is inflated to the correct pressure. Check that the jack's mechanism is clean and operates smoothly. A drop of oil on the jack's screw thread can make a big difference. Make sure the locking wheel nut key is always in its designated spot.
Practice Makes Perfect
The best time to learn how to change a tire is not on a dark, rainy night at the side of a busy motorway. Choose a clear day and practice the entire process on your driveway. This builds muscle memory and confidence, so when you have to do it for real, you'll know exactly what to do without stress.
How To Change A Tire FAQ
How tight should the lug nuts be?
They should be very tight. Using the lug wrench supplied with your car, tighten them as much as you reasonably can using your strength and body weight. The best and most accurate method is to use a torque wrench set to the manufacturer's specified Newton-metres (Nm) or foot-pounds (ft-lbs), which you can find in your owner's manual.
Can I drive normally on a space-saver spare tyre?
Absolutely not. These tyres are for emergency, temporary use only. They have strict speed and distance limitations printed on the sidewall, typically under 50 mph for no more than 50 miles. Their narrower size also affects your car's handling and braking. Drive cautiously and get your main tyre repaired or replaced as soon as you can.
Why is the 'star pattern' so important for tightening?
The star pattern ensures the wheel is drawn onto the hub evenly. If you tighten the nuts in a circular order, one side of the wheel can get tightened down first, causing the wheel to sit at a slight angle. This can lead to dangerous vibrations, uneven wear, and potentially cause the wheel nuts to loosen over time.
What if I've lost my locking wheel nut key?
Losing the key is a major problem. You will not be able to remove the wheel. A tyre garage may have a master set of keys or a special tool that can remove the locking nut, though this can sometimes damage the nut or the wheel. It's best to order a replacement from your vehicle's main dealer. You'll usually need your vehicle identification number (VIN) to do so.
Final Checklist for how to change a tire
Before you drive off, run through this quick final mental checklist to ensure everything is safe and secure.
- Handbrake engaged: Confirm the handbrake is still on before you get in the driver's seat.
- Lug nuts tight: You gave the nuts a final check for tightness after lowering the car.
- Tools stowed: The jack, wrench, and flat tyre are all secure in the boot and won't roll around.
- Pressure checked: You have a plan to check the spare tyre's pressure at the very next opportunity.
- Limits known: You are aware of the speed and distance limits for your temporary spare tyre.
- Area clear: You've removed the wheel chocks and any warning triangles.
With these checks complete, you can safely continue your journey. Remember to book your car in for a tyre repair or replacement as soon as possible.