Pyöränpultit

Pyöränpultit, or wheel bolts, are fasteners used to attach a vehicle's wheel to its hub. They are a critical component of a car's wheel assembly, ensuring the wheel remains securely in place during operation. Unlike wheel studs, which are threaded bolts permanently attached to the hub, wheel bolts are threaded into the wheel hub itself, and the wheel is then secured by tightening the bolts through the wheel's mounting holes.

The design of pyöränpultit varies, but they typically consist of a threaded shank and a head that seats against the wheel. The head often has a specific shape, such as a conical (tapered) or spherical seat, designed to mate with a corresponding recess in the wheel. This ensures proper centering and flush seating of the wheel against the hub. The thread pitch and diameter are standardized according to vehicle manufacturer specifications.

It is crucial to use the correct type and size of pyöränpultit for a particular vehicle. Using incorrect bolts can lead to improper wheel seating, vibration, or even the wheel detaching from the vehicle, posing a significant safety hazard. When replacing wheels or performing maintenance, it is recommended to tighten wheel bolts to the manufacturer's specified torque using a torque wrench. Regular inspection for damage or wear is also advisable.