Drive longer with less fatigue

Give both your school bus passengers and driver an upgrade in stability and safety, along with a boost in comfort. Drivers and passengers alike instantly notice the difference. Drivers experience less fatigue and safer handling. Passengers enjoy not bouncing around or sliding out of their seats when cornering. The proven LiquidSpring™ smart suspension for bus applications offer superior advantages over conventional suspensions. Don’t just take our word for it.

Improve both safety and comfort

This is the Suspension with CLASS®

Compressible Liquid Adaptive Suspension System

LiquidSpring is a smart suspension system for ambulances, shuttle buses, RVs, school buses and work trucks. Liquid-based struts and an onboard processor provide better handling and control when you need it, and a smoother, softer ride when you want it. The reduced vehicle vibration increases comfort and can also lower maintenance costs. In short, we named our company LiquidSpring because it is the heart of our system, a shock-absorbing liquid, enhanced with smart controls to bring you the right sized spring for every moment, instead of a one-size-fits-all metal spring solution.

See How It Works

Smart Suspension Features at a Glance

Test Track Video

See how this bus performs under a variety of poor road conditions. LiquidSpring not only adds passenger comfort, but it also prevents stress on the chassis frame, reducing repairs from rough conditions.

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Don’t Just Take Our Word For It

See what others have been saying about LiquidSpring suspension.

I couldn’t get the passengers to slide out of the seats

I wanted to thank you for allowing me to drive the Special Needs bus at RWC, Central location. I was excited to drive the bus. I wanted to give it my best opinion, so I took out my 2019 CE the day before heading down to Phoenix, so I could have a fresh perspective of how my bus with air ride stood up to the Liquidspring suspension.

I have to say that I was impressed with the handling differences.
I noticed right away when I pulled out of the driveway. There was not the rocking movement typical for the passengers. The bus was smoother when going over the ‘great’ streets around RWC, off of Central Ave. I pushed the limits, going around corners fast and making aggressive lane changes. I wanted to see if the body roll was different; it was. I couldn’t get the passengers to slide out of the seats, which had happened when I was a new driver back in 1997. I was impressed with the handling of the bus, with sharp maneuvering and in and out of driveways.

I feel that with the smoother ride, there would be a lot less adjustments needed with the wheelchair lift and all the other components (AC lines, that have broke, the heater covers, screw heads that have popped off, AC covers, air canisters, etc.) that vibrate loose with our ‘great’ roads here in AZ.

Thank you again for the opportunity to drive a bus with this new type of suspension available on the CE for International school buses.

Nancy Geesey, Director of Transportation, Kingman Academy of Learning

Our overall initial impression is glowing

ASDB Transportation had driven and ridden in a bus that was equipped with LiquidSpring. Our overall initial impression is glowing. We feel that the system provided a superior ride comfort that we will be interested in installing in our buses. The ride difference was noticeably better for both the passengers and the driver. LiquidSpring provided additional comfort, less vibration, and a quieter ride.

Albert S. Duff IV, Program Manager Facilities and Transportation,, Arizona State Schools for the Deaf and Blind (Tucson Campus)
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FMVSS 136 Testing Report

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LiquidSpring is proud to announce that FMVSS 136 testing is scheduled and a report is slated for release in the first half of 2021. This is a federal requirement for all aftermarket vehicle upgrades. Be the first to know!

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Supported School Bus Chassis

Chevy/GMC G3500/4500 suspension.


Ford E-350 suspension, Ford E-450 suspension and Ford F-550 suspension.

Ford E Series

International Durastar suspension.


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