pyöränpulttien

Pyöränpultit, known in English as wheel bolts, are essential components for securing a vehicle's wheel to its hub. They are threaded fasteners that pass through holes in the wheel and screw into threaded holes or a hub assembly. Unlike wheel studs, which protrude from the hub and are secured by nuts, wheel bolts are inserted into the wheel first and then into the hub.

The design of wheel bolts varies, but they typically feature a tapered or rounded seat that mates with a corresponding recess in the wheel. This seating is crucial for centering the wheel correctly and ensuring it is held flush against the hub. The threads on the bolt must match the threads in the hub or the caliper bracket for proper engagement.

Wheel bolts are made from high-strength steel to withstand the significant forces they encounter, including rotational forces, braking forces, and the weight of the vehicle. Regular inspection of wheel bolts for signs of wear, stretching, or corrosion is recommended as part of routine vehicle maintenance. Overtightening or undertightening can lead to serious problems, including wheel detachment. Therefore, it is important to use a torque wrench to tighten wheel bolts to the manufacturer's specified torque values. Different vehicles use different thread sizes and seat designs, so it is vital to use the correct type of wheel bolt for a specific make and model of car.