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Ram Promaster

Suspension solutions engineered for van life builds, commercial fleets, and work-ready upfits—designed to reduce sag, improve stability, and deliver lasting comfort and control for every ProMaster configuration.

Why ProMaster Builds Need Upgrades
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Targeted suspension solutions built for heavy-duty ProMaster applications and demanding mileage.

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Stay Level Under Load

Maintain proper ride height and support for camper builds, service upfits, and full cargo loads.

Control Sway & Roll

Enhance stability in crosswinds, cornering, and emergency maneuvers.

Absorb Road Impacts

Progressive springs smooth out potholes, uneven pavement, and heavy rear weight.

Simple, Maintenance-Free Install

Bolt-on design—no air lines, compressors, or upkeep required.

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

Proven ProMaster Upgrades for Demanding Builds

Proven ProMaster Upgrades for Demanding Builds The Ram ProMaster is built for versatility, but added weight, upfits, and constant use can challenge the factory suspension. These upgrades improve ride quality, load control, and handling while preserving comfort and ride height.

✅ SumoSprings Solo – Rear progressive springs for load support and sway control.
✅ 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 Configuration

Perfect Fit for All Promaster Models
Precision-fit suspension kits for all ProMaster models—Cargo, Passenger, RV Conversion, and Cab & Chassis. Each system maintains proper ride height, load stability, and handling across every roof height and wheelbase, keeping your van controlled and comfortable under any condition.
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 built to perform in every ProMaster application—from daily routes to extended travel.

Adventure Vans

Added support for rooftop tents, interior builds, and gear-heavy setups.

Delivery Fleets

Improved control and comfort for constant stop-and-go driving.

Commercial Upfits

Enhanced stability for shelving, tool racks, and mounted equipment.

Camper Conversions

Smooth, predictable rides with full interiors, water systems, and solar installs.

Level. Stable. Comfortable.

Upgrade Your Promaster Today

Give your ProMaster the suspension support it needs to manage heavy loads, long routes, and rough terrain. Our bolt-on upgrades improve stability, safety, and comfort—no air systems, compressors, or complicated installs required.

Find the Right Kit for You

Explore Other Van Models

Select your van model to find suspension upgrades engineered for your build, payload, and driving demands.

Ford Transit

Enhanced load support and sway control for work vans and camper conversions.

Mercedes Sprinter

Suspension upgrades designed for overlanding, delivery, and custom camper builds.

Find the Right Kit for You

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