A flat tire always seems to happen at the worst possible time: on a highway shoulder, in a dark parking lot, or on the way to something you can't be late for. The good news is that changing a tire is one of the most approachable repairs a driver can learn, and once you've done it once, you'll never feel helpless about it again. This guide walks through the whole process, from finding a safe spot to pull over to tightening the last lug nut, plus what your spare tire can and can't do once it's on the car.
Before you get into the steps, know that specifics vary by year, make, and model. Jack points, lug nut torque, and spare tire type are different across vehicles, so if you want a video that matches your exact car, CarCareKiosk has free model-specific how-to videos you can look up by year, make, and model. This article covers the general process that applies to the vast majority of passenger cars and trucks on the road today.
What You'll Need
Most of these items already live in your car, but it's worth confirming before you're stranded, not after. Pop your trunk or cargo area right now and check.
- Properly inflated spare tire (check it every few months, since spares slowly lose air too)
- Jack (usually a scissor jack that came with the car)
- Lug wrench or tire iron
- Wheel lock key, if your car has locking lug nuts
- Owner's manual, to confirm your car's specific jack points
- Wheel wedges or heavy rocks, to chock the wheels
- Flashlight or phone light, for low-light situations
- Reflective triangle or hazard flares, if you have them
- Gloves, to keep your hands clean and protected
Difficulty, Time, and Cost
This is a beginner-friendly job, typically rated easy to moderate depending on how stuck the lug nuts are and how comfortable you are working near traffic. Most people can complete a tire change in 20 to 40 minutes once they've done it a time or two, though your first attempt might take closer to an hour. There's no real cost involved if you already have a spare and jack, which come standard with most vehicles. If you're buying a replacement spare, tire wedge, or a better lug wrench, budget roughly $60 to $150 depending on tire size and quality.
Step 1: Find a Safe Place to Stop
The single most dangerous part of a flat tire isn't the mechanical work, it's doing that work next to moving traffic. As soon as you notice a flat, tap your hazard lights and look for a flat, stable surface well away from the flow of traffic: a parking lot, a wide shoulder, or a side street. Avoid soft grass, gravel, or an incline if you can help it, since the jack needs solid, level ground to work safely.
If you're on a highway and can't find an exit immediately, ease off slowly and pull as far right as possible, ideally past the white line and onto the shoulder. Keep your hazards on the entire time you're stopped. If you have a reflective triangle, set it about 50 to 100 feet behind your car to warn approaching traffic, especially at night or in poor visibility.
Never change a tire on the traffic side of the car, and never crawl underneath a vehicle that's only supported by a jack. If your flat happened somewhere that doesn't feel safe, such as a narrow shoulder on a fast road, it is worth calling roadside assistance instead of attempting the change yourself.
Step 2: Prep the Car Before You Jack It Up
Put the car in park (or first gear for a manual transmission) and set the parking brake firmly. This keeps the car from rolling while it's partially lifted, which is one of the more common and preventable tire-change accidents. If you have wheel wedges or a couple of heavy rocks, place them against the tire diagonally opposite the flat, meaning if your front left tire is flat, chock the rear right tire.
Next, remove the hubcap or wheel cover if your car has one, and use the lug wrench to loosen each lug nut about a quarter to half turn while the tire is still on the ground. Loosening them now, while the wheel's weight is holding it still, is far easier and safer than trying to break them free once the car is jacked up and the wheel spins freely. Do not remove the lug nuts entirely yet, just crack them loose.
Step 3: Position the Jack Correctly
This is the step where people most often get into trouble. Every car has specific, reinforced jack points built into the frame, usually marked by a small notch or indentation along the rocker panel near each wheel. Check your owner's manual to find the exact location for your vehicle, since jacking up a car at the wrong spot can dent the body panel, damage the frame, or cause the car to slip off the jack entirely.
Once you've found the correct point closest to the flat tire, position the jack underneath it and start raising it slowly. Watch closely as it makes contact to be sure it's seated squarely against the metal, not at an angle. Raise the car until the flat tire is about 4 to 6 inches off the ground, giving you enough clearance to remove the wheel and slide the spare into place without it dragging.
Step 4: Remove the Flat and Mount the Spare
With the car safely raised, finish unscrewing the lug nuts by hand and set them somewhere you won't lose them, like a cup holder or your pocket. Grip the flat tire on the sides, pull it straight toward you, and set it aside. It's heavier than it looks, so lift with your legs, not your back.
Line up the spare tire's holes with the wheel bolts and push it onto the hub. Thread each lug nut back on by hand, tightening them just enough to hold the wheel snug against the hub. Work in a star pattern, meaning you tighten one, then skip to the one roughly across from it, rather than going around in a circle. This pulls the wheel on evenly instead of pulling it slightly off-center.
- Lower the car slowly until the spare tire touches the ground but the full weight of the car isn't fully on it yet.
- Use the lug wrench to tighten each nut firmly in that same star pattern, applying real muscle now that the wheel can't spin freely.
- Lower the jack the rest of the way and remove it completely.
- Give each lug nut one final, hard check with the wrench to be sure nothing loosened during the lowering process.
Understanding Your Spare Tire's Limitations
Not all spares are created equal, and this matters a lot for what you do next. A full-size spare that matches your other tires can generally be driven like a normal tire, though it's still smart to get your flat repaired or replaced soon. A compact spare, often called a "donut," is a temporary fix only. These are smaller, lighter, and built purely to get you to a repair shop, not to be driven indefinitely.
Most donut spares are limited to about 50 miles per hour and shouldn't be driven more than roughly 50 to 70 miles before you get the flat fixed or replaced. Driving faster or farther than that puts extra strain on your car's drivetrain, since the donut spare has a smaller diameter than your other tires and forces the differential to work harder to compensate. It's also worth noting that many newer vehicles skip a spare tire altogether in favor of a tire inflator kit or run-flat tires, so check your trunk ahead of time to know exactly what you're working with.
When to See a Mechanic Instead
Changing your own tire is a great skill, but there are times it makes more sense to call for help. If the flat happened on a fast-moving highway with no safe shoulder, if you're dealing with a locking lug nut and can't find the key, if the lug nuts are rusted or stripped and won't budge, or if the tire blew out badly enough to damage the wheel itself, it's safer and often faster to call roadside assistance or a mobile mechanic. There's no shame in that call. It's exactly what that service exists for, and it keeps you out of traffic.
Learning to handle small repairs like this yourself is also part of a bigger money habit: the less you outsource routine car care, the more you keep in your pocket over the course of a year. If you're working on tightening up your finances more broadly, our guide to budgeting basics is a good next stop. And for more everyday car maintenance content, follow TRE Forged on Instagram (@treforged).
Quick Recap
- Pull over to a flat, stable spot away from traffic and turn on your hazards.
- Put the car in park or gear, set the parking brake, and chock the opposite wheel.
- Loosen the lug nuts slightly while the tire is still on the ground.
- Place the jack at your car's correct reinforced jack point and raise it slowly.
- Remove the lug nuts fully, pull off the flat, and mount the spare.
- Hand-tighten the lug nuts in a star pattern, then lower the car partway.
- Fully tighten the lug nuts with the wrench, lower the car completely, and remove the jack.
- Recheck all lug nuts one more time before driving off.
- Drive cautiously to a repair shop, respecting your spare tire's speed and distance limits.