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TRUCK & VAN UPFITTERS

Factory suspensions are built for versatility — not the constant weight, added equipment, and unique loads of upfitted vehicles. Once shelving, service bodies, or tools are added, stock suspension quickly hits its limit, causing sag, sway, and uneven handling. SuperSprings International provides suspension solutions engineered for builders who need reliable, maintenance-free performance across every upfit — from one-off builds to large fleet programs — helping vehicles perform as good as they look.

Built for Builders. Trusted by Fleets.
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Suspension simplicity that installs fast, performs reliably, and never
needs a second look.

control car

Less Sway, More Control

Upfits add weight and change handling. Our suspension systems keep trucks and vans stable under added bodies and tools — reducing roll, bounce, and uneven ride for safer control.

Stays Level Under Load

Maintain ride height and balance, even with uneven payloads or specialized gear, for smoother handling and fewer issues.

Zero Maintenance

No air lines, compressors, or tuning — just durable, bolt-on components that work daily without service.

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Made in the USA

Engineered, tested, and built in the USA — trusted by top upfitters, OEMs, and fleets for lifetime reliability.

Smarter Suspension. Stronger Builds.

PERFORMANCE THAT ADAPTS TO EVERY LOAD — WITHOUT EXTRA WORK.

Every upfit changes how a vehicle rides and handles. The added weight of bodies, tools, and equipment pushes factory suspension beyond its limits — especially when payloads vary from day to day.

That’s why SumoSprings are the perfect fit for upfitters and fleet builders. Made from microcellular polyurethane, they compress progressively under load — soft enough to absorb road vibration when the vehicle is light, and firm enough to keep it level and stable when fully equipped. No air systems. No leaks. No maintenance. Just consistent, predictable performance that helps every build ride better, handle safer, and last longer.

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Product Spotlight – SuperSprings

BIG SUPPORT. SIMPLE INSTALL.

THE RELIABLE LOAD SOLUTION FOR UPFITTERS AND FLEET BUILDS
SuperSprings Helper Springs automatically adjust to changing loads — providing extra support only when your trucks or vans need it. They keep vehicles level, reduce sway, and improve control without air systems, compressors, or complicated installation.

Designed to bolt directly above the factory leaf springs, SuperSprings can be installed in under an hour, making them ideal for high-volume upfit programs and fleet builds that demand repeatability and reliability.

From single service vans to heavy-duty work trucks, SuperSprings give your builds the consistent, maintenance-free load support they need to perform better, longer, and with less downtime.
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Engineered for Real-World Work

Whether you’re upfitting a service van, a fleet of delivery vehicles, or a work-ready truck, we’ve got you covered.

Service & Utility Builds

Support added bodies, shelving, and equipment while maintaining consistent ride height and handling.

Delivery & Mobile Service Vans

Stabilize the chassis for smoother rides, better braking, and less driver fatigue on stop-and-go routes.

Fleet & Commercial Vehicles

Reduce sag, sway, and uneven wear for vehicles that operate under constant load and high mileage.

Custom & Specialty Upfits

Bolt-on integration for unique builds — reliable, repeatable suspension support that’s easy to scale across platforms.

Build Better. Deliver Stronger.

READY TO UPGRADE YOUR BUILDS?

SuperSprings, SuperCoils, and SumoSprings give upfitters the strength, stability, and consistency needed to build vehicles that perform as good as they look — all in a maintenance-free, bolt-on design that lasts for the life of the chassis.

Whether you’re standardizing a fleet program or crafting a single custom build, our suspension solutions help every upfit handle better, sit level, and deliver a more confident, predictable driving experience for your end users. Because when your builds perform better, your reputation does too.

Find the Right Kit for You

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