What is the size of sedan tire bolts?
2 Answers
Different vehicles have different sizes, which depend on the specific model. Common socket sizes for tire bolts are 17, 19, 21, and 23. Additional information is as follows: 1. Hub Bolts: Hub bolts are high-strength bolts that connect the wheels to the vehicle. The connection point is the wheel hub unit bearing. Generally, micro vehicles use 10.0 grade, while medium and large vehicles use 12.9 grade. The structure of hub bolts typically includes a knurled key section, a threaded section, and a cap head. 2. T-Head Hub Bolts: T-head hub bolts are mostly grade 8.8 or higher, designed to handle the high torque connection between the wheel hub and the axle. 3. Double-End Hub Bolts: Double-end hub bolts are mostly grade 4.8 or higher, designed for lighter torque connections between the outer wheel hub shell and the tire.
When I used to drive a sedan, I changed the tires myself a few times and realized there's really no standard size for lug nuts—it all depends on the car model and brand. My family Toyota, for example, uses M12x1.5, meaning the bolt diameter is 12mm with a 1.5mm thread pitch, which I measured multiple times to confirm. But my friend's Ford Escort uses M14x1.5, and even a slight difference can make tightening feel off. I strongly recommend checking the owner's manual or looking up your specific model online for the exact specs—don't just guess. Using the wrong size can prevent achieving the proper torque, which may cause the wheel to loosen and lead to dangerous accidents at high speeds. I bought a universal wrench set, measured the size before changing tires—safe and cost-effective. Never cut corners for convenience.
