Follincraft

Chris FollinBy Chris Follin

Home / How-To / Plug a Tire

ROADSIDE REPAIR

How to plug a tire

A string plug can get you off the shoulder and back to civilization, but it is not the same thing as a proper tire repair. Treat it like an emergency field fix, then have the tire inspected from the inside.

Gloved hands using a T-handle tire plug tool on a punctured tire tread
TireRoadsideRepair
Best For
Small punctures in the center tread area when the tire can still hold shape.
Core Idea
Remove the object, ream the hole, insert a plug, trim it, inflate, and check for leaks.
Use
Plug kit, pliers, valve gauge, inflator, soapy water, gloves, and wheel chock.
Do Not
Do not plug sidewalls, shoulders, large holes, shredded tires, or tires driven flat.

Know what this is

A roadside plug is a temporary move. Proper repair means the tire comes off the wheel, gets inspected inside, and is repaired with the right internal patch/plug method. If the puncture is in the shoulder or sidewall, replace the tire.

If the tire was driven flat, has sidewall damage, or the hole is larger than about 1/4 inch, stop and use the spare or roadside help.
String tire plug being inserted into a tread puncture with repair tools nearby
Use plugs only for small tread punctures, then verify pressure and get the tire inspected.
LocateConfirm the puncture is in the tread area, not the shoulder or sidewall.
PlugUse the rasp and insertion tool straight through the puncture path.
VerifyInflate to spec and check for bubbles before driving.

Basic roadside steps

  1. Park safely. Flat ground, hazards on, brake set, wheel chocked if needed.
  2. Find the leak. Listen, feel, or use soapy water.
  3. Remove the object. Pull the nail or screw with pliers.
  4. Ream the hole. Work the rasp in and out to clean the path.
  5. Load the plug. Thread it through the insertion tool with cement if your kit uses it.
  6. Insert and pull back. Leave the plug folded in the tire, then trim the excess.
  7. Inflate and check. Watch pressure and look for bubbles.

Okay candidate

  • Nail or screw in the center tread.
  • Tire did not run flat.
  • No bulges, cords, cracks, or cuts.

Not okay

  • Sidewall or shoulder puncture.
  • Large puncture, tear, or multiple close injuries.
  • Any tire you cannot reinflate and hold pressure.

After the plug

Drive gently, recheck pressure soon, and get a proper tire shop inspection. The win is getting home without pretending the field fix is permanent.

TrailerBack up a trailerToolUse a multimeterToolsOpen references