The structure of the tire screw is very simple, it is composed of screw, nut and washer. According to the different screw structure, can also be divided into single head bolt and stud, now the vast majority of cars are single head bolt,
stud is generally used in small and medium-sized trucks. There are two ways to install single-head bolts. One is hub bolts + nuts. The bolts are fixed on the hub with interference fit, and then the wheels are fixed by nuts.
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