The kingpin locking mechanism on a semi-truck trailer is what allows thousands of big trucks to make shipments all across the U.S. Here's how it works.

The king pins are vital components in your Peterbilt semi truck’s steering system, playing a key role in ensuring smooth and ...

What's A Kingpin, And How Does It Work On Semi-Trucks? The kingpin is located underneath the front axle of a semi-trailer. It ...