Change your first tire in the driveway, not on the highway

Quick answer: Loosen the lug nuts before you jack the car up, then lift, swap, and tighten in a star pattern. And do your first one at home on a Saturday, so the second one, on the side of a road, is boring.

It's 9:40 on a Tuesday night. You're on a county road with no streetlights, the car's pulling hard to the right, and there's a flapping sound that wasn't there a minute ago. You pull over. Your phone's at 11 percent. You open the trunk and realize you don't know where the jack is, or whether this car even has a spare.

That's how most guys learn to change a tire. It's a terrible way to learn anything.

So don't. Pick a dry afternoon this week, ask your dad or mom or whoever owns the car to stand there with you, and change a perfectly good tire in the driveway. It takes about 30 minutes the first time. It'll take 15 the second.

Find out what you're working with first

Before you touch a wrench, open the trunk and lift the floor panel. You're looking for one of three things:

• A full-size spare. Same as your other four. Best case.
• A compact temporary spare, the skinny "donut." It gets you to a tire shop, not across the state. Most are rated around 50 mph and a limited number of miles. The exact limits are printed on the spare's sidewall or in the owner's manual. Read them.
• No spare at all. Plenty of newer cars come with a sealant-and-compressor kit instead. If that's yours, the plan is different, and you need to know that today, not at 9:40 on a Tuesday.

Then find the jack, the lug wrench and, if the car has one, the wheel lock key. That's a special socket for one locking nut on each wheel. If it's missing, that tire isn't coming off without a shop. Find it now.

Last thing: check the spare's air pressure. Spares sit forgotten for years and go soft. Temporary spares often need a much higher pressure than regular tires. The number is on the spare's sidewall.

The step-by-step

1. Get somewhere safe and flat. Hazards on. Off the road as far as you can get, on pavement if possible. Car in park (first gear for a manual), parking brake set hard. Anyone riding with you gets out and stands well away from traffic, not between the car and the road.

2. Block the wheel diagonally opposite the flat. Flat on the front right? Wedge something solid behind the rear left: a wheel chock, a brick, a chunk of wood. That keeps the car from rolling when one corner's in the air.

3. Pop off the hubcap if there's one, and loosen the lug nuts while the tire is still on the ground. This is the step people skip, and it's why they end up spinning a wheel in midair while the nut doesn't move. Turn each nut counterclockwise about half a turn. Just break them loose. Don't take them off.

They'll be tight. Really tight. Put the wrench on so the handle points to about 9 o'clock and push down with your foot. If you have to, stand on it and bounce a little. That's normal, not a sign you're doing it wrong.

4. Jack it up at the right spot. Your owner's manual shows the jack points. On most cars it's a reinforced notch along the metal seam under the door, just behind the front wheel or just ahead of the rear one. Put the jack anywhere else and you'll bend the body or the jack will slip.

Raise it until the flat is an inch or two off the ground. That's all you need.

Never put any part of your body under a car held up by a jack. The little jack in your trunk is built to lift, not to hold. Hands and feet stay clear.

5. Take the nuts off and pull the tire. Put the nuts in the upturned hubcap or your pocket. A lug nut that rolls into a storm drain turns a 15-minute job into a long night. Grab the tire at 9 and 3 o'clock and pull it straight toward you.

If it's rusted on and won't budge, rock it hard side to side, or give the tread a solid kick from the side. Then slide the flat under the car's frame next to the jack. If the jack ever slips, the car lands on that tire instead of the ground.

6. Put the spare on. Line up the holes with the studs and push it all the way flush. Thread every nut on by hand first. If one fights you, back it off and start again. Forcing it with the wrench strips the threads, and now you have two problems.

7. Snug them, lower it, then tighten for real. Snug the nuts with the wrench in a star pattern, skipping across rather than going around in a circle. That pulls the wheel on evenly. Lower the car until the tire just touches the ground, tighten again in the same star pattern, as hard as you reasonably can. Then lower it all the way and pull the jack.

8. Pack up and check it. Flat tire, jack, wrench, lock key, all back where they live. Within the next 50 miles or so, have a shop or a parent with a torque wrench check the nuts. They can loosen a little as everything settles, and the correct tightness for your car is in the manual.

The stuff that goes wrong

Nobody tells you these until they happen to you:

• The jack sinks. On dirt or gravel, it'll push into the ground instead of lifting the car. Keep a short scrap of 2x6 board in the trunk to set it on.
• It's dark. Your phone flashlight is killing a battery you might need to call for help. A cheap headlamp lives in the glovebox for exactly this.
• Your hands get filthy. A pair of work gloves and a rag weigh nothing.
• You lose a nut, or round one off. Drive slowly on what you've got (four nuts on a five-nut wheel will get you to a shop at low speed) and get it fixed the same day.

When not to do it at all

This part matters more than the steps.

If you're on the traffic side of a busy highway, on a curve with no shoulder, in heavy rain, or anywhere you feel unsafe, don't change it there. Either drive slowly on the flat to the next exit or a parking lot (yes, you'll wreck the tire, and a tire is cheaper than you are) or stay in the car with your seatbelt on and call your parents or roadside assistance.

That's not weakness. Knowing how to do something and knowing when not to are both part of being competent. The guy who changes a tire six inches from 70-mph traffic to prove a point isn't tough. He's lucky, until he isn't.

Bring it back better than you got it

If it's a parent's car, or a friend's, the job isn't done when the spare is on. Get the flat repaired or replaced, put the full-size tire back on, and get that spare back in the trunk, aired up and ready for the next person. Then tell the owner what happened before they find out on their own.

That's the difference between a guy who fixed a problem and a guy people trust with their keys. It's the same thing as being reliable at fifteen instead of thirty, and it starts with small, unglamorous stuff in the house you already live in.

Your Saturday checklist

• Find the spare, jack, wrench and lock key
• Check the spare's pressure
• Read the jack-point page in the manual
• Change one tire, start to finish, with someone watching
• Put a board, gloves and a headlamp in the trunk

Do it once. Then the next time you see a car on the shoulder with someone staring into an open trunk, you'll know exactly what they're looking for. And you'll know how to help.