Experience a smoother, more responsive, and ultimately safer ride with our LiquidSpring smart suspension. We call it CLASS® for Compressible Liquid Adaptive Suspension System. This is the next generation vehicle suspension system utilizes a strut with a compressible liquid as the spring/damping medium. With its patented onboard microprocessor controlling individual components based on various inputs including speed, steering, & wind, LiquidSpring adapts the entire vehicle’s response to various road conditions, giving the driver, medical professionals and patients alike the safest ride available.

More than 95% of Type 1 Ambulances Trust LiquidSpring when Lives are on the Line


Compressible Liquid Adaptive Suspension System

Experience a smoother, more compliant ride with safer handling with LiquidSpring’s new suspension system. With CLASS® technology, or Compressible Liquid Adaptive Suspension System, LiquidSpring is the next generation vehicle suspension system. LiquidSpring’s technology utilizes a strut with a compressible liquid as the spring/damping medium and a sophisticated on-board microprocessor to adapt the entire vehicle’s response to road variations and the driver.

See How It Works

Smart Suspension Features at a Glance

EMS Ambulance Video

LiquidSpring not only adds passenger comfort, but it also prevents stress on the chassis frame, reducing repairs from rough conditions.

More Videos

Don’t Just Take Our Word For It

See what others have been saying about LiquidSpring suspension.

Our salesperson recommended taking a look at the LiquidSpring

Redmond Fire & Rescue provides ambulance service to a population of 42,000 people that covers both city and off-road driving surfaces. Over the years we have received complaints from our firefighter/paramedics and customers that our ambulances did not provide a smooth ride.

While in the process of ordering a new ambulance our salesperson recommended taking a look at the LiquidSpring™ Suspension as an option for our new ambulance. After test-driving the Liquid suspension and a thorough review by our mechanics we were sold on the suspension. We ordered a LiquidSpring Suspension for our existing 2012 Ford/F-450 immediately after the test drive.

I was very impressed by Carl Harr, our LiquidSpring Suspension salesperson. Carl was knowledgeable, confident, and no-nonsense. Our mechanics under Carl’s watchful eye installed the LiquidSpring Suspension in one day, which was very impressive. Our firefighter/paramedics and patients are very happy with their new suspension. We just ordered our third Ford/F-450 and specified the LiquidSpring Suspension.

Tim Moor, Fire Chief, Redmond Fire & Rescue

Seeing it in action convinced me

Mr. Meyer,testimonial-grandcounty-co

I wish to thank you for providing a quality product that improves the ride, safety, and use of our ambulances. Grand County EMS purchased three 2013 Dodge four-door cab chassis with 4 wheel drive and included a LiquidSpring suspension.

During our design process, our team evaluated a number of products to provide a kneeling system to bring our load height to a reasonable level. During the design process, we spoke with several individuals as we looked at various systems. During a conference in Denver in 2012, I meet with Carl and he introduced me to the LiquidSpring suspension.

I brought this revolutionary information to my team to evaluate. Carl made himself available to us, educating us on the system. I also had the opportunity to see firsthand the system on an ambulance. This sealed the deal, seeing it in action convinced me and my team that this was the right product to improve our ambulance design.

The ambulances were built by an outstanding ambulance manufacture, AEV Ambulances, and with the assistance of our local representative Mark Balch from Front Range Fire Apparatus. Together we choose LiquidSpring for our new AEV ambulances. During the delivery of the ambulances, my team and I had the opportunity to meet and visit with the gentleman who installed the system on our AEV ambulances. He acknowledged the ease of installation and how impressed he was with the system. From the moment I inspected the ambulance I was impressed by how it performed and exceeded my expectations.

When my team and I departed from the AEV factory we logged 1800 miles on the drive to Grand County, Colorado. The LiquidSpring suspension did everything you and Carl had said it would do. It is so nice to purchase a product that meets a high standard and expectations.

The ambulances were placed into service in December and I along with one of my team ran the first emergency call. The patient had experienced multiple fractures and the roads are bumpy, during the transport I never felt any bumps. The ride was so smooth, so nice, and brought comfort to everyone inside the ambulance.

In summation, I am very happy with the LiquidSpring System and would recommend it to anyone who wants to improve safety and ride comfort. In Grand County, Colorado the temperature dips down to -30 degrees and the issue of kneeling the ambulance in these conditions has not an issue with the Class LiquidSpring System. The ambulances kneel to a safe deck height for loading and unloading and return to service level just as described by you and Carl. I also was impressed having Carl come to our agency and provide an in-service for the LiquidSpring System. I am thankful we opted to purchase the Class LiquidSpring System for our ambulances and now it will become a standard on all future Grand County EMS ambulances.

Kind regards and thank you.

See More EMS Testimonials

Four Corners Means Complete Stability Control

The popular LiquidSpring smart suspension upgrade is now available on all four corners as an integrated system on select chassis. This makes four-corner kneeling a new possibility. LiquidSpring’s CLASS® suspension system was initially offered as a rear-only suspension. From variable loading weights to impacts passed along the frame from front to back, the front suspension provides significant support to the chassis and system. All front-wheel suspension systems must be accompanied by a matching rear suspension system for connectivity.

Four-corner kneeling is especially appreciated by senior and infirm family and passengers who ride along in the front seat of an ambulance. Lower step height improves access for these riders. It also speeds up access for the driver and passengers by eliminating loading delays.

Improved Ride For Drivers

Besides four-corner kneeling, what does the optional front suspension upgrade offer? It provides further improvement to ride and handling by absorbing more vibration. It also notably provides even more driver comfort by reducing fatigue from rough roads and long hauls. The front suspension, being underneath the driver, is a large contributor to the shaking sensation felt through the seat and steering wheel of the vehicle. LiquidSpring’s improved absorption of these forces reduces felt vibrations significantly, giving drivers a more luxurious and safer feel to the ride.

Off-road? Bad road? Overheight To The Rescue

Another unique advantage provided is four-wheel overheight capability. The opposite of kneeling, overheight offers maximum ground clearance while at slower speeds. It allows the vehicle to clear road obstacles such as minor debris or rough road conditions. Gravel roads that have been washed out by rain are a common situation in rural areas. The deep ruts in the road surface require more height to clear the changes in the road level without bottoming out. Both front and back suspension height have pre-set heights options to help give drivers more control in these difficult situations.

Front and Rear Suspension Options

LiquidSpring’s smooth suspension is standard as a rear suspension only, where it is needed most. However, on select chassis there is an optional front suspension upgrade to further improve ride and handling. It also provides even more driver comfort by reducing felt vibration on rough roads.

Supported EMS Front Suspension Chassis



Supported EMS Rear Suspension Chassis

Chevy EMS Suspensions


Ford E Series




How can we help you?