Tractor trailer and heavy-duty truck designers have been using airbag helper springs forever. They are the perfect suspension solution if you want a truck to give a soft and flexible ride but still be ...

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.

Just as you wouldn’t overload a packhorse, it’s just not right to overload your workhorse van. Sure, a Ram ProMaster van is designed to carry heavy cargo (rated for 4,440 pounds, max), but nobody ...