What is the size of car tire bolts?
2 Answers
Different car models use different tire bolts, but the common specifications are 17mm, 19mm, 21mm, and 22mm. The wheels are fixed with bolts, and different cars have different numbers of bolts and different bolt specifications for fixing the wheels. More information about tire bolts is as follows: 1. When tightening the wheel fixing bolts, they should be tightened in the specified order and with the specified torque. 2. Some high-end cars have aluminum wheel fixing bolts, which cannot be tightened with an impact wrench. Aluminum wheel bolts will break directly if tightened with an impact wrench. 3. The wheel fixing bolts only need to be removed and installed when replacing a spare tire or all four tires.
I've been driving for over a decade, and tire bolts are something you can't take lightly. If the bolt sizes on the wheel hub are incorrect, the tire can wobble and loosen at high speeds, or even fly off, which is extremely dangerous. Common sizes follow the metric thread system, such as M12x1.5 or M14x1.5, where 'M' stands for metric, the number 12 or 14 indicates the bolt diameter in millimeters, and 1.5 is the thread pitch in millimeters. But it varies by vehicle—my old Ford used M14x1.5 bolts, about 30mm long, while newer models might use smaller ones. Last time I helped a neighbor change a tire, he used the wrong size, and the wheel rattled so badly on the road that he had to pull over in a panic. I recommend checking the owner's manual or asking a dealership—don’t cut corners by guessing the size. Safety comes first, and a small mistake could lead to big trouble. If you’re doing it yourself, use a caliper to measure the diameter and thread pitch, note the exact specs, and then buy the right spare parts.
