How to Change a Flat Tire: Step-by-Step Guide (USA)
How to Change a Flat Tire
How to Change a Car Tire Step by Step: Flat Tire Tools, Safety, Cost & Roadside Tips for USA Drivers
30 MIN Typical Time |
10 STEPS Full Process |
4 TOOLS Must Haves |
50 MPH Donut Spare Speed Limit |
Introduction
Nobody plans for a flat tire. A deflated tire usually shows up on a busy road, in bad weather, or right when you are already late. The good news is that changing a tire is a skill you can learn in one afternoon, and once you have done it, the fear mostly disappears.
In this guide I will show you how to change a tire from start to finish, in plain language. You will see what tools to keep in the trunk, how to stay safe near traffic, the exact order of steps, and what a repair or replacement usually costs in the USA. I will also be honest about when it is smarter to stop and call for help instead of doing it yourself.
Tools You Need
Most cars come with a basic kit, but it is worth checking that everything is actually there. Open the trunk floor panel and look. On some SUVs and trucks the spare is mounted underneath the vehicle, on the back door, or on an outside carrier at the rear or side instead.
- Spare tire: a full size spare, a compact "donut" spare, or none at all (many new cars skip it).
- Jack: the scissor or bottle jack that came with your vehicle.
- Lug wrench: the tool that fits your lug nuts. A longer breaker bar makes stuck nuts much easier.
- Owner's manual: it shows the correct jack points for your exact model.
- Locking lug nut key: some cars have one anti theft nut that needs its own special key. Check the glove box or trunk before you ever need it.
Extras that I strongly recommend: a pair of work gloves, a small flashlight, wheel chocks (or a couple of bricks or wood blocks), a tire pressure gauge, and a reflective triangle or flares.
Safety First
The tire is the easy part. Your safety on the roadside is the real priority.
- Slow down gradually and pull as far off the road as you safely can. A flat, level, firm surface is ideal. Avoid hills, curves and soft ground.
- Turn on your hazard lights right away.
- Set the parking brake. Put an automatic in Park, or a manual in first or reverse.
- Have all passengers get out and wait in a safe spot away from traffic, such as behind a guardrail.
- Place wheel chocks against the tire diagonally opposite the flat (for example, behind the rear tire on the other side if the front is flat).
How to Change a Flat Tire Step by Step
Want to change a car tire quickly? Good preparation beats speed. Take your time, because rushing is how people strip lug nuts or slip a jack.
Step 1: Get your gear out. Take the spare, jack and lug wrench from the trunk and place them near the flat tire. Check the manual if you are unsure where the jack points are.
Step 2: Remove the wheel cover if you have one. Some wheels have a hubcap or cover that must be pried off first. Many alloy wheels have small caps over the lug nuts instead.
Step 3: Loosen the lug nuts while the car is still on the ground. Lug nuts are the fasteners that hold the wheel on the hub. Turn the wrench counterclockwise about half a turn to one full turn on each nut. Do not remove them yet. The weight of the car on the ground keeps the wheel from spinning.
Step 4: Place the jack at the correct jack point. Your manual shows the reinforced spot on the frame near the flat tire. Using the wrong spot can bend the body or make the car unstable. Many cars also have plastic side skirts that crack if the jack presses on them, so look for the marked notch or the metal pinch weld.
Step 5: Raise the vehicle. Jack it up until the flat tire is a few inches off the ground. You need enough room to fit the fully inflated spare, which sits taller than the flat.
Step 7: Mount the spare. Line up the holes in the spare with the wheel studs and push it fully onto the hub. Make sure the valve stem faces outward.
Step 8: Hand tighten the lug nuts in a star pattern. Thread each nut on by hand first, then snug them with the wrench. Tighten in a crisscross (star) pattern rather than going around in a circle. This seats the wheel evenly.
Step 9: Lower the car and tighten fully. Lower the vehicle until the spare touches the ground but does not carry the full weight, and tighten the nuts firmly in the same star pattern. Then lower it all the way, remove the jack, and give each nut one last firm tighten.
Step 10: Check and pack up. Check the spare's pressure with a gauge. A spare that has sat in the trunk for months often loses air, so top it up before you drive. Put the flat tire, jack and tools back in the trunk, and remove the wheel chocks.
After you drive, re check the lug nuts after about 50 miles, since they can settle. Ask a tire shop to tighten them to your vehicle's exact torque spec, which is listed in the owner's manual.
Spare Tire Types and Limits
Not every spare tire is the same, and the limits matter. A compact spare, also called a temporary spare, a donut or a space saver spare wheel, is only meant to get you to a shop. Always check the spare's sidewall and your owner's manual for the real numbers on your car.
| Spare Type | What It Is | Typical Limits |
|---|---|---|
| Full size spare | Matches your regular tires | Drive normally, but still get the flat repaired soon |
| Compact donut spare | Smaller, narrower temporary tire | Often about 50 mph and roughly 50 miles |
| Run flat tires | Reinforced sidewalls, no spare needed | Often about 50 miles at up to 50 mph after pressure loss |
| Sealant and inflator kit | Fix in a can plus a small air pump | Temporary fix for small tread punctures only |
So how far can you drive on a spare tire? With a compact spare, plan on about 50 miles at most and keep your speed at or under about 50 mph. That is how many miles you can drive on a spare tire before the flat needs to be repaired or replaced, and it is a trip to the nearest shop, not a road trip. A full size spare is different and can be driven normally.
If your car has no spare at all, check right now what it came with. Many newer vehicles ship with only a sealant kit, and that will not help with a sidewall tear. Teslas, for example, do not come with a spare tire at all.
When Not to Change It Yourself
In my opinion, knowing when to stop is part of the skill. Call roadside assistance or a tow when:
- You are on a narrow shoulder, a curve, a busy highway or a steep hill.
- The ground is soft, icy or sloped.
- The lug nuts will not budge, or you have locking nuts and cannot find the key.
- You do not have a spare, a working jack or a lug wrench.
- You feel unsafe for any reason, including darkness or bad weather.
Many drivers already have roadside help through their auto insurance, a credit card, an auto club or the vehicle manufacturer. It is smart to save that phone number in your contacts today. Many drivers also pay for a professional tire change at a shop when conditions are unsafe, and that is a perfectly fine choice.
Cost to Repair or Replace a Tire in the USA
Once the spare is on, the next question is what the flat will cost you. Prices vary by region, tire size and shop, and online sources do not all agree, so treat these as rough ranges and call a shop for a real quote.
| Service | Rough Cost in the USA |
|---|---|
| Patch or plug repair | About $20 to $50 at many shops (cheaper in some areas, higher in big cities) |
| New tire | From about $100 to $300 or more per tire, depending on size and brand |
| Valve stem replacement | About $5 to $15 |
| Tire balancing | About $10 to $20 per tire |
A puncture in the middle of the tread can often be repaired. Damage to the sidewall or shoulder generally cannot be repaired safely, and a badly worn tire should be replaced anyway. If your tires are under warranty or you bought road hazard coverage, ask about it before paying.
Common Mistakes
- Loosening lug nuts after the car is already in the air
- Jacking at the wrong spot on the body
- Tightening nuts in a circle instead of a star pattern
- Skipping the parking brake or wheel chocks
- Driving fast or far on a donut spare
- Never checking the spare's air pressure
- Loosen first, lift second
- Follow the manual's jack points
- Crisscross pattern every time
- Brake on, hazards on, chocks in place
- Keep it slow and head straight to a shop
- Check the spare every few months
How to Prevent Flat Tires
You cannot avoid every nail on the road, but you can cut your odds a lot.
- Check tire pressure monthly and before long trips. Read our tire pressure check guide for the right way to do it.
- Look over the tread and sidewalls for cracks, bulges, nails or screws.
- Replace tires that are worn down or very old.
- Rotate your tires as your manual recommends so they wear evenly.
- Avoid potholes and curbs when you can.
FAQs
Do you need a jack to change a tire?
Yes. You need a jack to lift the flat off the ground and a lug wrench to remove the nuts. If either one is missing, do not try to improvise. Call roadside assistance instead.
How long does it take to change a tire?
Most beginners need around 30 minutes. With practice it can take 15 minutes or less.
Which way does a spare tire go on, and which side faces out?
Mount the spare so the side with the valve stem faces outward, away from the car. If the valve stem points toward the vehicle, the tire is on backward.
Can you change a tire on an incline?
It is not recommended. A slope makes it much easier for the car to roll or slip off the jack. If you can reach a flat, firm spot safely, move there first. If not, call roadside assistance.
Where do you put a jack when changing a tire?
Place it on the reinforced jack point on the frame, close to the flat tire. Many cars have a marked notch or a metal pinch weld there, and your owner's manual shows the exact spot. Avoid plastic side skirts and thin body panels, because they can crack or bend.
What is the final step in the tire repair process?
After the spare is on and your tools are packed, the final step is getting the flat inspected at a tire shop to see if it can be repaired or must be replaced. Also have the lug nuts rechecked after about 50 miles and the spare's pressure checked.
What are the fasteners in a tire change?
The fasteners are the lug nuts (or lug bolts on some European cars) that hold the wheel on the hub. Keep them together so none get lost, reuse the same ones on the spare, and tighten them in a star pattern.
Is changing a flat tire on a truck different?
The steps are the same, but trucks are heavier, so use the jack made for your truck and check the manual for the jack points. On many pickups the spare hangs under the bed and is lowered with a crank tool. For a heavy duty truck or dual rear wheels, I would call roadside assistance.
Can I drive on a flat tire?
No. Driving on a flat or fully deflated tire can ruin the tire, damage the wheel and make the car hard to control. Pull over safely as soon as you can.
How long, how far and how fast can you drive on a spare tire?
With a compact donut spare, keep your speed at or under about 50 mph and plan on roughly 50 miles at most, or whatever the sidewall and your manual say. That is a short trip to a tire shop, not a long drive. A full size spare can be driven normally, but get the flat fixed soon and check the spare's pressure first.
Do Teslas have spare tires?
No. Teslas generally leave the factory without a spare tire. Tesla points owners to a tire repair kit (sealant and a small air compressor), roadside assistance, and its tire service instead. Third party compact spare kits exist if you want one, but they take up cargo space.
How long can a spare tire last?
A compact spare is built for a short emergency trip, not for daily use. Even unused, a spare tire ages, because the rubber breaks down over time. Many tire makers suggest replacing tires about 6 to 10 years after they were made, even if they look new. Check the four digit date code on the sidewall: the first two digits are the week and the last two are the year.
What is the diameter of a T155/70D18 spare tire?
T155/70D18 is a common compact spare size. The T means temporary use, 155 is the width in millimeters, 70 is the sidewall height as a percentage of the width, D means diagonal (bias ply) construction, and 18 is the wheel diameter in inches. Together that makes the overall tire diameter roughly 26.5 inches. Always check the size printed on your own spare.
Should I use a tire plug or a patch?
A combination plug and patch applied from the inside is generally the more reliable repair. A plug alone is better seen as a temporary fix.
Can a sidewall puncture be repaired?
Usually not. Sidewalls flex constantly, so tire shops typically replace the tire when the damage is there.
What if the lug nuts are stuck?
Try a longer wrench or breaker bar for more leverage and push down with steady pressure. If they still will not move, stop and call roadside assistance rather than risk stripping them.
Do I need to replace all four tires if I get one flat?
Not always. If the other tires have plenty of tread and are close in wear, one replacement can be fine. All wheel drive vehicles can be more sensitive, so check your manual or ask a tire shop.
Is roadside assistance worth having?
In my opinion, yes. It costs little compared with a tow, and it is a real lifesaver on busy highways or at night.
Conclusion
Changing a flat tire comes down to three things: park safely, follow the steps in order, and tighten the nuts in a star pattern. Once you have done it once, it stops feeling scary.
In my opinion, every driver should practice this at home and keep a basic kit in the car. The ideal reader for this guide is a new driver, a student, or anyone who has never touched a jack. I would recommend checking your spare and tools this weekend, so you are ready before you ever need them.
Have you ever had a flat tire in a bad spot? Tell us in the comments what happened and what you would do differently.
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