How to change a flat tire safely on the roadside and use the spare properly
Getting a flat tire can be frustrating, but with a calm approach and the right steps you can get back on the road safely. This guide walks you through practical actions, from securing the scene to installing the spare, so you can do the job efficiently and confidently.
Step 1: Find a safe spot
Pull over as far from traffic as possible onto a level, firm surface—ideally 10–20 feet from the lane. Turn on your hazard lights, set the parking brake, and place wheel chocks (or heavy objects) behind the diagonally opposite wheel to prevent rolling.
[Illustration: car pulled over on the roadside with hazard lights on, parking brake engaged, and wheel chocks behind a tire]
Step 2: Gather tools and spare
Retrieve your jack, lug wrench, and vehicle jack pad or block; also get the spare tire and owner's manual. Keep tools within reach on a flat mat or cardboard to stay clean and organized—this saves 1–2 minutes and avoids searching in the trunk.
[Illustration: open trunk showing spare tire, jack, lug wrench, and owner's manual arranged neatly]
Step 3: Loosen lug nuts slightly
Use the lug wrench to turn each lug nut counterclockwise a half to one full turn while the wheel is still on the ground to prevent it spinning. Loosening now requires about 10–30 pounds of force; you can brace your foot on the wrench for leverage but do not remove the nuts yet.
[Illustration: person standing with foot on lug wrench beginning to loosen lug nuts on wheel still touching ground]
Step 4: Position and raise jack
Consult the owner's manual for the correct jacking point near the flat; place the jack pad on solid metal and raise the vehicle until the flat tire is 2–3 inches off the ground. Raise the car in 1–2 minute increments and double-check the jack sits straight and stable before continuing.
[Illustration: side view of car with jack correctly placed under jacking point and the wheel lifted a few inches off the ground]
Step 5: Remove wheel and inspect
Fully remove the loosened lug nuts and place them in a small container so they don't roll away, then pull the flat wheel straight off. Inspect the hub for damage and look at the spare to confirm proper inflation (typically 60–80 psi for a compact donut or 30–35 psi for a full-size spare).
[Illustration: removed wheel leaning against car, lug nuts in a small container, person checking spare tire pressure with gauge]
Step 6: Mount spare and hand-tighten
Align the spare with the hub bolts and slide it on, then hand-thread the lug nuts until snug to ensure the wheel sits flush. Tighten nuts in a crisscross star pattern to distribute pressure evenly; this prevents the wheel from seating crookedly.
[Illustration: spare tire mounted on hub, hands starting to hand-tighten lug nuts in star pattern]
Step 7: Lower and torque lug nuts
Lower the vehicle until the spare touches the ground and remove the jack; then torque the lug nuts to the manufacturer's spec (typically 80–100 ft-lb for many passenger cars) using a calibrated torque wrench, tightening in the same crisscross pattern. Stow tools, check the spare pressure again, and drive slowly for the first 1–2 miles to confirm stability before resuming normal speeds.
[Illustration: person using a torque wrench on lug nuts with car on ground, tools and removed flat nearby]
- Practice the jack and lug nut routine in a driveway once so you know locations and jacking points ahead of time.
- Keep a compact digital tire pressure gauge and a flashlight in the vehicle; they save time and reduce guesswork.
- If your spare is a temporary 'donut', limit speed to 50 mph (80 km/h) and avoid long distances—get a full repair or replacement within 50–70 miles.
- Wear gloves and eye protection to keep hands clean and prevent injury from metal burrs or debris.
- Place reflective triangles 10–20 feet behind your vehicle if you must work near traffic for added visibility.
- Record the tire’s position and condition with a quick photo before stowing the flat to help mechanics and insurance later.
- Never get under a vehicle supported only by a jack; use jack stands on level ground for any work underneath.
- Do not drive at high speeds or for long distances on a compact spare—this can damage suspension, brakes, and the spare itself.
- Avoid jacking on soft ground, gravel, or uneven surfaces—jack failure may cause the car to fall and cause injury.
- If you smell fuel, see significant damage to the wheel well, or the car leans severely after jacking, move to a safer location and call roadside assistance.
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