Editor's note: An earlier version of this story incorrectly said Ram pioneered coil spring rear suspension on full-size pickups. Chevrolet C10 pickups carried the technology in the 1960s. Ford's ...

The leaf spring suspension has practically been around since humanity invented the wheel due to its effectiveness and simplicity. For a variety of reasons, the tried-and-true suspension still exists ...

Rassini’s 1+C Hybrid leaf spring features a single steel parabolic main plate and a flat glass fiber composite helper plate to provide suspension on the rear wheels of the Ford F-150 pickup truck.