FREE DOMESTIC SHIPPING UNDER 50LBS

CAB & CHASSIS

Factory suspensions are made for flexibility — not the constant weight of upfitted service bodies, cranes, and tool loads. Once equipped, cab and chassis trucks often face sag, sway, and uneven handling. SuperSprings International solves that with real-world load support that keeps trucks level, stable, and predictable mile after mile. From single upfits to full production runs, we help you build vehicles that drive as solid as they’re built.

A Better Ride, Without the Complications
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Everything your builds need for safer handling and a smoother ride —
without the extra work.

control car

Less Sway, More Control

Reduces body roll and bounce when trucks are loaded with heavy equipment or bodies. Delivers steadier handling and fewer driver complaints.

Stays Level Under Load

Keeps trucks level under constant tool, tank, or machinery weight, improving balance and extending suspension life.

Zero Maintenance

No air lines, compressors, or adjustments — just reliable, long-term performance that keeps vehicles on the job, not in the shop.

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Made in the USA

Built in the USA and backed by a lifetime guarantee — trusted by OEMs, upfitters, and fleets across the country.

Support When You Need It. Stability When It Counts.

SMARTER SUSPENSION FOR EVERY BUILD

Cab and chassis platforms are built to be adaptable — but once a service body, crane, or utility box is added, the factory suspension often struggles to keep up. That’s where SumoSprings come in. Made from microcellular polyurethane, SumoSprings react to load in real time — soft when lightly loaded, firm when the weight builds. They cushion vibration, reduce sag, and keep every truck level and composed, no matter how it’s outfitted.

It’s a simple, maintenance-free way to give your builds the support they need without adding complexity or compromising ride quality.

Find the Right Kit for You

Product Spotlight – SuperSprings Helper Springs

BIG DIFFERENCE, SIMPLE UPGRADE

PERFECT FOR CAB & CHASSIS BUILDS AND UPFITS
SuperSprings Helper Springs automatically adjust to changing loads, adding support only when it’s needed. When your trucks carry cranes, tanks, service bodies, or other upfit equipment, SuperSprings keep the chassis level, reduce sway, and improve handling — all without air systems or manual adjustments.

They bolt directly above the factory leaf springs, install in under an hour, and immediately improve ride control under load. For upfitters and fleets, that means faster installs, fewer warranty claims, and longer-lasting suspension performance on every build.
Find the Right Kit for You

What Our Customers Are Saying

My 2017 Hyundai SF is a great SUV with the only complaint I’ve had is the rear suspension seems underside and appears to easily bottom out. I had the Coil SumoSprings installed and they made a noticeable improvement when pulling a 21′ boat.

Scott

2017 Hyundai Santa Fe

I just did a 900-mile ski trip from South Carolina to West Virginia in my 2017 Dodge Journey. With the car packed to the roof and skis on the rack, the rear Coil SumoSprings made a huge difference — cutting down sag, improving stability, and reducing body roll on curvy mountain roads. Install took some effort, but it was worth it. I’ve already ordered the front set to complete the setup.

Clarkson

2017 Dodge Journey

Bought a pair of the CSS-1195 for my 2018 Toyota Sienna XLS AWD. Very easy to install the SumoSpring for the front suspension. Noticeable improvements of the body roll reduction at the corners, which leads to better handlings and driving experience. Very satisfied with the purchase.

M. Huang

2018 Toyota Sienna XLS AWD

Engineered for Real-World Work

Whether you’re building, upfitting, or maintaining work-ready vehicles, we’ve got you covered.

Service Bodies

Keep trucks level and composed under the constant weight of tools, compressors, and mounted equipment.

Construction & Trades

Handle heavy payloads, uneven jobsite terrain, and frequent stops without sag or sway.

Utility & Delivery Fleets

Improve ride stability and reduce wear for vehicles that run loaded all day, every day.

Upfit & OEM Applications

Integrate dependable, maintenance-free suspension support that installs easily and performs for the life of the vehicle.

Build It Right. Keep It Working Every Day.

READY TO UPGRADE YOUR FLEET?

SuperSprings and SumoSprings give your cab & chassis builds the stability, control, and long-term reliability they need — all in a simple, maintenance-free design. Whether you’re upfitting service bodies, delivery fleets, or utility trucks, our suspension solutions help you deliver vehicles that stay level, drive smoother, and last longer. Because when your trucks work better, your business does too.

Find the Right Kit for You

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