Changing a flat tire safely comes down to three things done in the right order: pulling completely off the road to a flat, stable spot before doing anything else, loosening the lug nuts before raising the car rather than after, and tightening them in a star pattern once the wheel is back on rather than working around in a circle. Each of these three details is where people most commonly get it wrong, and each has a real safety or mechanical reason behind it.
Step 1: Get to a Safe Location
Pull as far off the road as possible — a flat, level shoulder, a parking lot, or any spot away from moving traffic — even if it means driving a short, careful distance further on the flat tire than feels ideal. Turn on hazard lights immediately once you notice the flat, and if you have reflective triangles or flares, place them behind the vehicle in the direction of oncoming traffic.
Step 2: Prepare the Car
- Apply the parking brake and, if on a manual transmission, leave it in gear (or Park on an automatic).
- Chock the wheel diagonally opposite the flat if you have wheel chocks or improvised blocks, to prevent any rolling.
- Retrieve the spare, jack, and lug wrench, typically stored under the trunk floor or in a dedicated compartment.
Step 3: Loosen the Lug Nuts Before Jacking
With the wheel still on the ground, break the lug nuts loose about a quarter turn each — the tyre’s grip on the pavement gives you the resistance needed to loosen them; once the wheel is off the ground and spinning freely, you have nothing to brace against and the wheel will just turn instead of the nut loosening. This is one of the most commonly skipped or reversed steps.
Step 4: Raise the Car and Remove the Wheel
- Position the jack at the correct lift point, specified in your owner’s manual — using the wrong point risks damaging the underbody or the jack slipping.
- Raise the car until the flat tire is a few inches off the ground.
- Remove the loosened lug nuts fully and pull the wheel off, setting it flat on the ground rather than standing it up where it could roll.
Never work under a vehicle supported only by a jack. Use axle stands on firm, level ground, chock the wheels that stay down, and leave the car in gear or Park with the handbrake on. A jack lifts; stands hold.
Step 5: Mount the Spare and Tighten in a Star Pattern
- Mount the spare onto the wheel studs and thread each lug nut on by hand first.
- Tighten in a star or crisscross pattern — not sequentially around the circle — which pulls the wheel evenly onto the hub rather than cocking it slightly to one side.
- Lower the car back to the ground before doing the final full tightening, since you’ll have much better leverage and stability with the wheel’s weight on the ground.
- Do the final tightening in the same star pattern, checking that each nut is genuinely snug.
After the Swap
- Check spare tyre pressure as soon as convenient, since spares are often stored underinflated and need topping up before extended driving.
- Re-torque the lug nuts after driving roughly 50-100 miles, since they can settle slightly after the initial tightening.
- Check how far and how fast you can drive on the spare before extended use — most compact spares have real speed and distance limits printed on the spare itself or in the owner’s manual.
- Get the flat tyre repaired or replaced promptly rather than leaving the spare on indefinitely.
When to Call for Help Instead
If you’re on a busy highway with no safe shoulder, if the flat is on the traffic side of the car with no room to work safely, or if you’re not confident in the process, calling roadside assistance is the safer choice over attempting the change in a genuinely dangerous location. Otherwise, more in our maintenance section for related tyre care guides, including tyre rotation and reading your tyre’s sidewall.
Frequently Asked Questions
Should I loosen the lug nuts before or after jacking up the car?
Before — with the wheel still on the ground, you have the resistance needed to break the nuts loose. Once the wheel is off the ground and spinning freely, the wheel will just turn instead.
What’s the right way to tighten lug nuts?
In a star or crisscross pattern rather than sequentially around the circle, which pulls the wheel on evenly rather than cocking it slightly to one side.
Where should I put the jack?
At the specific lift point detailed in your owner’s manual — using the wrong point risks damaging the underbody or the jack slipping.
How far can I drive on a spare tire?
It depends on the type of spare — many compact spares have real speed and distance limits, covered in detail in our dedicated spare tire distance guide.
When should I call roadside assistance instead of changing it myself?
If you’re on a busy highway with no safe shoulder, if the flat is on the traffic side with no room to work safely, or if you’re not confident in the process.
