
As long as the tire damage is not severe, it can usually be repaired by patching. However, if the tire damage is serious, it is recommended to replace it with a new one. Here are situations where tire replacement is not necessary: Damage diameter on the tread is less than 6mm: During daily use, it is most common for a tire to be punctured by a nail, and often it goes unnoticed at the time. A nail piercing the tire does not significantly damage the tire's structure; it merely creates a hole in the steel belts, fabric layers, and polyester layers, which can be repaired. Excessive tread damage: If the tread comes into contact with a sharp object, causing severe tread pattern loss or the tire body to be cut, and the puncture hole exceeds 6mm in diameter, the tire cannot be safely repaired. In such cases, the punctured tire must be replaced to ensure driving safety. Bulging: Bulging occurs when the cords in the fabric layers break. If this happens, the tire must be replaced immediately, as delaying replacement could lead to the risk of a blowout.

If you suddenly feel the steering wheel becoming heavier or hear a 'clicking' sound while driving, immediately check if the tire pressure warning light on the dashboard is on. The last time I encountered this situation on the highway, I directly turned on the hazard lights and pulled over to the emergency lane. Remember, never pull out the nail! Many cars now come with tire repair fluid, but it's only suitable for temporary use on small punctures. Drive slowly to the nearest repair shop, making sure the tire pressure doesn't drop below 1.5 bar. If you're changing the spare tire yourself, make sure to firmly engage the handbrake and use a rock to block the tire to prevent rolling. The spare tire has a speed limit of 80 km/h—those thin tires won't last long. If it's late at night in a remote area, just call your company for roadside assistance.

I've seen someone pull out a nail on the spot, only for the tire to go 'hiss—' and lose all its air. The correct approach is to drive with the nail to a repair shop, as the nail can temporarily seal the puncture. Pour soapy water around the nail; if bubbles appear, it means there's a leak. There are two types of tire repairs: mushroom plugs and patches. If the sidewall is damaged, don't repair it—just replace the tire. When changing a spare tire, make sure the jack is aligned with the raised steel beam on the chassis, not the plastic panel. Wheel bolts should be tightened diagonally. If you have an automatic tire repair kit, connect it to the air pump and inflate to the standard tire pressure; it can last for about 50 kilometers, which is much safer than changing to a spare tire.

I always keep an electric air pump in my car. If a nail punctures the tire, I inflate it first to check how fast it leaks. If it leaks slowly, I drive directly to get it patched; if it leaks quickly, I temporarily plug it with a sealant strip. Note that spare tires come in full-size and non-full-size versions, with non-full-size ones being as narrow and small as bicycle tires. Remember to wear thick gloves when repairing a tire yourself, and step on the wrench for leverage when removing the tire to save effort. Tires that have been patched twice are recommended to be replaced, especially the front ones. After patching, it's best to perform wheel balancing; otherwise, the steering wheel may shake at high speeds. Driving below 60 mph in the city is generally fine, but be sure to conduct a thorough inspection before hitting the highway.

Don't panic when you find a nail in your tire. First, check the nail's location. If it's in the middle of the tread, it's easy to repair, but if it's on the tire shoulder, you'll need to replace the tire. Use a tire pressure gauge for a more accurate check—if the pressure is below 1.8, you must address it immediately. An inflator connected to the cigarette lighter can serve as an emergency solution, and modern inflators can even measure tire pressure. If you have a tire repair kit with rubber plugs, pull out the nail and insert the plug right away, like giving the tire a 'shot.' However, a plug repair only lasts about three months. Important note: A repaired tire shouldn't be used as the primary tire, especially in rear-wheel-drive vehicles—move it to the front. Before a long road trip, consider carrying an external tire pressure monitor—this small, inexpensive gadget could save your life.

An old driver taught me this rhyme: If there's a nail, don't pull it out, drive slowly. Water the tire to check for leaks. Tire repair shops usually offer three options: a $3 plug patch, an $8 mushroom plug, or a $15 hot patch. If the sidewall is damaged, replace the tire directly. When changing to a spare tire yourself, remember: 1. Loosen the bolts before jacking up the car. 2. If the spare tire nuts face inward, they'll grind against the brakes. 3. Use your full body weight to tighten the bolts. Don't use a spare tire for more than a week. For example, my car's compact spare can only go up to 200 kilometers. After repair, ask the mechanic to check for leaks with soapy water—many forget this step.


