Whether You Can Drive Depends on the Nail's Location and Your Distance
A nail in your tire does not automatically make the car undrivable, but it does create real risk that grows with every mile. If the nail is in the tread (the part that touches the road) and not near the edge, you can usually drive to a repair shop at normal highway speed — the tire pressure keeps the nail from moving deeper. If the nail is in the sidewall (the curved part between tread and rim), do not drive at all; sidewall punctures cannot be repaired and the tire can fail suddenly at speed.
The practical rule: if you can see the nail clearly and it went straight in, you can drive 20 to 30 miles at moderate speed to reach a tire shop. If you cannot see where it entered, if it is at an angle, or if the tire is already losing pressure, treat it as a sidewall puncture and call for a tow. Driving on a tire that is actively deflating will damage the sidewall beyond repair and turn a $20 fix into a $150 tire replacement.
Key Takeaways
- A nail in the tread can usually be driven on for 20 to 30 miles at normal speed, but a nail in the sidewall means the tire cannot be repaired and you should not drive.
- Check the tire pressure with a gauge — if it is dropping, the puncture is large enough to cause sidewall damage and you should stop driving when ready.
- The location of the nail matters more than the size; a small nail in the sidewall is more dangerous than a large nail in the tread.
- A tire repair shop can patch a tread puncture in 15 to 30 minutes for $10 to $25, but only if you bring the tire before the sidewall is damaged.
How to Tell If the Nail Is in the Tread or Sidewall
The tread is the grooved rubber surface you see when you look at the tire from the side — it is the part that grips the road. The sidewall is the smooth curved rubber between the tread and the metal rim. A nail in the tread sits in a groove or on a raised section. A nail in the sidewall sits on the smooth, curved part and often appears to be sticking out at an angle rather than straight.
If you cannot tell by looking, run your hand over the area around the nail (do not pull the nail out). The tread has deep grooves and raised ribs; the sidewall is smooth and flexible. If the nail is in a groove or on a rib, it is in the tread. If it is on smooth rubber, it is in the sidewall and the tire must be replaced.
A nail near the edge where the tread meets the sidewall is a gray area — some tire shops will refuse to repair it because the repair patch may not hold under the stress of cornering. If the nail is within half an inch of that edge, ask the shop whether they will patch it or recommend replacement.
What Happens If You Keep Driving on a Nail
A nail in the tread will slowly leak air, but the tire pressure usually stays high enough to support the car's weight for hours or even days. The risk is that the nail can shift or the hole can enlarge, turning a slow leak into a rapid one. If you notice the tire is softer than usual or the pressure warning light comes on, stop and check the pressure with a gauge. If it has dropped more than 5 pounds per square inch (psi) from the recommended level, do not drive further.
If you drive on a tire that is actively deflating, the sidewall will flex more than it is designed to, generating heat and breaking down the rubber. Once the sidewall is damaged, the tire cannot hold air and cannot be patched — you must buy a new tire. Driving on a severely underinflated tire also increases the risk of a blowout, which can cause loss of control at highway speed.
A nail in the sidewall will eventually cause the tire to fail, but the timing is unpredictable. It might hold for a week or fail within an hour. The failure often happens under load — when you accelerate, brake hard, or turn sharply — which is why sidewall punctures are dangerous. Do not gamble on a sidewall nail; replace the tire before you drive.
How to Temporarily Stop a Leak While You Drive to a Shop
If the tire is losing pressure but you are close to a repair shop, you can slow the leak by explore tire sealant (also called tire plug or tire repair spray) into the valve stem. This is a temporary measure only and will not hold for more than a few miles. Tire sealant comes in a can and is sold at gas stations and auto parts stores for $5 to $15.
To use it: remove the valve cap, attach the can's applicator to the valve stem, and spray for 2 to 3 seconds. Reinflate the tire with a portable air pump if you have one. The sealant will coat the inside of the tire and may seal the puncture enough to let you drive slowly to a shop. Do not drive at highway speed; the sealant is not reliable and the tire may still deflate.
A tire plug kit is another option if you have one in your car. These kits include rubber strips that you insert into the puncture hole after roughing up the hole with a tool included in the kit. Tire plugs work better than sealant for tread punctures and cost $5 to $10. However, they require you to remove the tire from the rim, which most people cannot do roadside without a jack and lug wrench. If you have these tools and know how to use them, a plug can get you to a shop; otherwise, sealant is faster.
When to Replace the Tire Instead of Repairing It
A tire shop will refuse to repair a puncture in the sidewall, near the edge of the tread, or larger than a quarter-inch in diameter. They will also refuse if the tire has been driven on while flat or severely underinflated, because the internal structure is damaged even if the puncture itself is small. In these cases, you must buy a new tire.
If the tire is old (more than 6 to 10 years), the shop may recommend replacement even if the puncture is repairable, because the rubber loses flexibility over time and a patch may not hold. Check the tire's age by looking at the sidewall for the DOT code — the last four digits are the week and year of manufacture (for example, 2419 means the 24th week of 2019). If the tire is older than 6 years and has a puncture, replacement is usually the safer choice.
The cost difference is significant: a patch costs $15 to $25, while a new tire costs $100 to $300 depending on the vehicle and tire quality. If you have a spare tire, you can use it to drive to a shop and buy a replacement on your schedule rather than in an emergency.
What to Do If You Have a Nail and No Spare Tire
If your car does not have a spare tire (many newer cars come with a tire repair kit or run-flat tires instead), you have three options: call a tow truck, use a portable air pump and sealant to limp to a shop, or call a mobile tire repair service that comes to you.
A tow truck will cost $75 to $150 depending on distance, but it is the safest option if the tire is losing pressure quickly or if you are on a highway. Most auto insurance policies cover towing, so check your policy before you call. AAA members also get free towing as part of their membership.
A mobile tire repair service will come to your location and patch or replace the tire on the spot, usually within an hour. These services cost $50 to $100 and are worth it if you are stranded far from a shop. Search online for "mobile tire repair near me" or ask your insurance company for a referral.
Frequently Asked Questions
Can I drive on the highway with a nail in my tire?
If the nail is in the tread and the tire pressure is normal, you can drive on the highway at normal speed for 20 to 30 miles to reach a shop. If the tire pressure is dropping or the nail is in the sidewall, do not drive on the highway; use a back road or call for a tow.
How long can I drive with a nail before the tire goes flat?
A nail in the tread may not cause a flat for hours or days, depending on the hole size and the tire pressure. A nail in the sidewall can fail suddenly without warning. Do not rely on time; check the tire pressure with a gauge and drive to a shop as soon as you notice the nail.
Will a tire plug or patch work on a nail hole?
Yes, a patch or plug works on a nail hole in the tread if the hole is smaller than a quarter-inch and the tire has not been driven on while flat. A plug is a temporary fix that may last a few thousand miles; a patch is more permanent. A tire shop will use a combination patch-plug for the best result.
Is it safe to pull the nail out myself?
Pulling the nail out will make the leak worse and larger. Leave the nail in place — it actually slows the leak by partially blocking the hole. Drive to a shop with the nail still in the tire and let the technician remove it.
What if the nail is in the tread but the tire is already flat?
If the tire is already flat or nearly flat, do not drive on it. The sidewall will be damaged and the tire will need to be replaced rather than patched. Call for a tow or use a mobile repair service.