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.

BrightDrop electric delivery vans (above) as well as Chevrolet Silverado/GMC Sierra pickups from General Motors Co. feature North America’s first composite tension leaf springs (TLS) with progressive ...

Time has a way of making everything sag, droop, and fall. Just ask anyone over the age of 40. Believe it or not, the suspension of an early-model RV, truck, or van is no different. Eventually it's ...