Changing a flat safely depends more on where you stop than on how quickly you work. On a bridge, in a tunnel, or on a narrow street with traffic passing close, the safer decision is usually to stay in the vehicle with hazards on and call for assistance.
When should I not change a flat tire myself?
The procedure is straightforward on a quiet street with a level surface. It is genuinelydangerous on a bridge approach, in a tunnel, on a highway shoulder, or anywhere you would bekneeling within a meter of moving traffic. Vehicles are replaceable; being struck whilecrouched beside one is not a risk worth taking to save a call.
Does every car come with a spare tire?
Many current cars carry no spare at all, only a sealant canister and a compressor, andsealant cannot address a sidewall tear or a large puncture. Check what is actually in yourtrunk before you need it.
Second, a temporary spare has a speed and distance limit, usually printed on the wheelitself. It is designed to get you to a shop, not to be driven on for a fortnight, and drivingbeyond that limit affects handling and can damage the differential on some vehicles.
How to Change a Flat Tire: Questions
How to change a flat tire safely on a city street?
Here is how to change a flat tire safely: stop somewhere level away from traffic, set the parking brake, loosen the lug nuts before jacking, then lift, swap the wheel, and tighten the nuts in a cross pattern.
When should I not change it myself?
On a bridge, in a tunnel, on a highway shoulder, or anywhere traffic passes close. Stay in the car with the hazards on and call for help.
How far can I drive on a space saver spare?
Only as far as your owner's manual allows, usually at reduced speed, so get the full-size tire repaired or replaced soon.

