backed by a lifetime guarantee

Ram Promaster

DIY suspension upgrades for van life builds, commercial work vans, and fully loaded fleets — purpose-built to enhance stability, reduce sag, and deliver lasting comfort and control for your Ram ProMaster.

Why Promaster Owners Upgrade
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Targeted suspension solutions for heavy-duty Promaster builds and long-haul driving.

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Stay Level Under Load

Support constant weight from camper conversions, upfits, and cargo.

Control Sway & Roll

Improve stability in crosswinds, curves, and sudden maneuvers.

Absorb Road Impacts

Progressive bump stops reduce harsh jolts from potholes and uneven pavement.

Simple DIY Install

Bolt-on kits require no air lines, compressors, or ongoing maintenance.

Most popular upgrades for adventure vans, delivery vehicles, and commercial fleets.

Best Ram Promaster Upgrades

Every Promaster kit is designed to complement the factory suspension while improving ride quality, stability, and load control. Whether you’re running a cross-country camper, delivering goods, or operating a work-ready fleet, these upgrades deliver reliable performance mile after mile.

✅ SumoSprings Solo – Rear progressive bump stops for load support and sway reduction.
✅ Coil SumoSprings – Front coil inserts for added stability under constant weight.

Find the Right Kit for You

From compact city haulers to extended high-roof conversions.

Engineered for Every Promaster Model

Perfect Fit for All Promaster Configurations
We offer precision-fit kits for every Promaster configuration — cargo, passenger, and chassis cab — across roof heights and wheelbases. Each upgrade is engineered to maintain correct ride height and handling, even under full load, so your van stays comfortable and controlled in all conditions.
Find the Right Kit for You

What Our Customers Are Saying

The entire process from ordering to delivery was absolutely seamless. Everything arrived quickly, well-packaged, and exactly as described. It’s refreshing to have such a smooth experience from start to finish, and it gave me confidence in both the product and the company before I even installed it.

Louise Pesano

Ram Promaster

The SumoSprings were incredibly easy to install, even without specialized tools, and the results were immediate. My van now feels much more stable on the road, with tighter, more confident handling — especially noticeable when taking corners or driving in crosswinds. It’s a simple upgrade that made a huge difference.

Nancie Ludwig

Ram Promaster 2500

I’m very pleased with adding SumoSprings to my van. The difference in handling is clear — there’s far less body roll, making it feel more planted and secure, and the sag when fully loaded has been greatly reduced. Whether the van is empty or packed for work, the ride feels more balanced and under control.

Brian Cerise

Ram Promaster

From Urban Deliveries to Off-Grid Escapes

Suspension solutions for the most demanding van builds and routes.

Adventure Vans

Extra support for rooftop tents, interior builds, and gear.

Delivery Fleets

Control and comfort for constant stop-and-go driving.

Commercial Upfits

Stability for shelving, tool racks, and onboard equipment.

Camper Conversions

Smooth, stable rides with water tanks, cabinetry, and solar setups.

Level. Stable. Comfortable.

Upgrade Your Promaster Today

Give your Promaster the suspension support it needs to handle heavy loads, long drives, and unpredictable roads. Our bolt-on solutions improve stability, safety, and comfort — no air systems or complicated installs required.

Find the Right Kit for You

Explore Other Van Models

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