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.

Every vocational truck suspension option comes with its own unique performance trade-offs. The best choice requires an understanding of how the trade-offs match up to your application requirements.

Whenever we think “leaf spring,” we can’t help but picture a crusty-old cowboy with wrinkled, leathery skin grinning out of the side of his mouth like he knows something everyone else doesn’t, while ...