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.

Leaf springs are pretty common on custom 4x4s, even though coil and coilover combinations are becoming quite popular. Coils and coilovers can be tempting, but don't sell the old-fashioned leaf-spring ...