I’d heard the unmistakable hiss of a punctured tire losing air, and alerted my partner, who was driving the Ford pickup we were using to conduct road surveys in southern Nevada. Our job took us down scarcely used tracks with significant incursion from creosote bushes, which leave vicious little daggers sticking out around the base of the plant as the perimeter dies off. This was our third puncture today—and it was not yet 8:00 in the morning.
Two minutes later we had the tire repaired and had resumed collecting GPS data. We didn’t even bother to add any air, much less replace the punctured tire with the spare.
Tire failure is by far the number one cause of vehicle breakdowns in the backcountry, whether you are exploring Nevada or Namibia. Yet I’m astonished at how many people still rely on a single spare and maybe a can of fix-a-flat as backup on remote excursions far from AAA. The irony is that the farther you are away from well-traveled routes and outside assistance, the higher the possibility of running into projecting root splinters, knife-edged rocks, or even an off-camber rut that can pop a tire bead right off the rim and deflate it instantly.
Why not be prepared, and self-sufficient? With a few tools, a good air compressor, and a proper repair kit, you’ll be able to repair any tire mishap short of a shredded blowout and be on your way.
Most tire problems result from simple punctures in the tread area, where the tire actually contacts the ground. Close to civilization, likely culprits include nails, bolts, and screws. Farther afield, you might run afoul of those creosote daggers or any number of other biological or geological hazards. At higher speeds, punctures typically occur on the rear tires—the front tire rolls harmlessly over a nail or screw lying flat, but pops it into the air where it can land pointy end up just as the rear tire passes. At low speeds, it’s more often the front tire that will find some projecting bit. A nail that embeds itself in a tire might not make its presence known for hours, since it forms a partial plug and slows deflation. A root end is more likely to puncture and pull out, causing rapid loss of air and possibly an audible warning.
The easiest and quickest way to repair a simple puncture is with a plug kit (which is what we used in Nevada). A tire plug comprises a short length of rubber-adhesive-impregnated nylon yarn, which is inserted into the puncture with a special tool, after reaming the puncture with another tool. Cheap plug kits are available everywhere, but skip them—plugging involes a fair amount of force, and you don’t want to push very hard on a plastic-handled tool embedded with a steel rod. High-quality plug kits with sturdy tools and better plugs come from Safety Seal and ARB. By far the most comprehensive tire repair kit I’ve used is the Ultimate Puncture Repair Kit from Extreme Outback, which includes not only plugs but an exhaustive assortment of patches, spare valve cores, valve stems, a valve core tool—everything you’d need to be self-sufficient on any trip up to and including a global circumnavigation.
The basic tools in a plug kit comprise the plugs, a reamer resembling a round file, and an insertion tool that has a large, slotted eye at the end. How do they work?