Can a tire with a nail in it be patched?

Often, yes. A nail in the tread of a tire that has not been driven flat can usually be repaired, and Virginia's inspection rules treat a proper plug or patch as acceptable. A nail in the sidewall cannot be repaired. Where the nail sits, and how the tire was driven after it went in, decide the answer.

Where the nail is decides it

Virginia's state safety inspection rules reject a tire with a cut or puncture into the fabric, but that does not include a plug or patch used as a repair.^[1] The same rule limits where a repair may be: plugs and patches must be in the tread area only, and they are not permitted in the sidewall.^[1]

In practice that gives you three cases:

• Nail in the middle of the tread. The usual repairable case.
• Nail at the shoulder, where the tread curves into the sidewall. Ask the shop to judge it. If the hole is outside the flat tread area, the answer is likely a replacement.
• Nail in the sidewall. Replace the tire. The sidewall flexes constantly and the rules do not allow a repair there.

Damage from driving on it

A slow leak from a nail is a small problem. A tire driven flat is a bigger one, because the sidewall can be crushed and damaged inside without showing it outside. The inspection rules reject a tire worn so that the fabric or steel cord is visible, and one with knots or bulges in the sidewall, a broken belt under the tread, or tread separating from the fabric.^[1] A shop that takes the tire off the wheel can look for those signs. If it finds any, the tire is not a repair candidate.

What to do with the nail in it

Do not pull it. Check the pressure, top up if the tire holds air, and drive slowly to a shop. If it is flat, change to the spare following your owner's manual. A compact spare is a short-term fix: Virginia's inspection rules reject a vehicle with a space saver emergency spare intended for temporary use installed on any axle,^[1] so get the repair done before your next inspection.

When wheels come off, whoever puts them back should tighten the lug nuts to the manufacturer's specification. The state's brake inspection rules give the same warning: if wheels are removed, lug nuts must be torqued to the manufacturer's specifications.^[2] If you changed the wheel yourself, have the torque checked at the shop.

What a proper repair looks like

Ask for these three things:

• The tire comes off the wheel. The shop inspects the inside liner and the area around the hole for damage.
• The repair is made from the inside. A patch or a combination plug-and-patch seals the inner liner and fills the hole. A rope plug pushed in from outside alone leaves the inside unexamined.
• The shop tells you its limit. Reputable shops follow the tire or repair-material maker's rules for hole size and position, and will tell you if yours is outside them. Ask what the rule is and who sets it.

Most shops charge a modest fee for this, and some honor a road hazard warranty if you bought one with the tires. Ask before the work starts. How much does a flat tire repair cost in Virginia? covers what makes the price move.

Stop and call a pro if

• The tire is flat and you cannot change it safely. On a busy road, a soft shoulder or a slope, do not jack the car. Call roadside help.
• The nail is in the sidewall or the shoulder. It cannot be repaired in the sidewall.^[1]
• You see a bulge, a knot or exposed cord. The inspection rules reject these,^[1] and the tire needs replacing.
• The tire has lost air repeatedly after a repair. The hole may be bigger than it looked, or the wheel's bead or rim may be leaking.
• You cannot read the pressure or the tire will not hold air at all. Do not drive on it.

Getting help in Virginia

Read more automotive repair answers. For a related inspection question, see will a cracked windshield fail Virginia state inspection.

When you are ready, describe the tire problem once and local shops quote it.