SuperSprings International has designed a SumoSprings Solo “airless airbag” auxiliary spring for the 2014 Ram ProMaster cargo van.

The one-piece SumoSprings Solo is composed of a proprietary microcellular urethane that fills the gap left by a short factory bump stop, which it replaces.

A pair of the springs improves ride, reduces side-to-side body roll and eliminates sudden bottoming out, said Mike Visser, the company’s president. They offer a progressive spring rate that provides full support when needed, while also engaging smoothly.

Owners can install the springs using common tools.

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