Kelderman Stock Height Air Suspension Kits

Because You Shouldn’t Have to Choose Between Ride Quality & Towing Ability

Truck manufacturers have given you the same suspension design for decades. But traditional leaf springs — and even modern coil springs — still struggle to balance a smooth ride with heavy towing capacity.

The best way to get the best of both worlds? An aftermarket air suspension kit from Kelderman. We offer the perfect option for your specific needs:

Our 2-Stage Air Suspension drastically improves ride quality while keeping your factory leaf springs and towing capacity intact.

Meanwhile, our 4-Link Air Suspension is the ultimate improvement, boosting ride quality while also reducing sagging when you’re towing heavy loads. It lets you adjust your ride height on the fly and also “kneel” below your stock height for trailer hitching, cargo loading, and more.

Pick the Perfect Kelderman Air Suspension

Maybe you don’t tow with your truck and are looking for improved ride quality. Or maybe you use your truck a little harder than you should. Either way, Kelderman air suspension has a solution for you. We offer air suspension on everything from pickup trucks to RVs, trailers, chassis cab trucks, and more.

Here’s a closer look at our two main types of air suspension kits:

2-Stage Air Suspension

Designed to soften your ride without removing your leaf springs. Best for drivers who want a smoother commute but don’t necessarily need any improvement in towing.

Design Features: Attaches an air bag framework to the rear of your factory leaf springs, acting as a shock absorber between the springs and your truck’s frame

Benefits: Greatly improves ride quality while maintaining factory suspension.

Installation: Fast and simple

4-Link Air Suspension

Our full-air replacement that combines luxury comfort and complete height control. Best for heavy-duty towers, RV pullers, and commercial vehicles.

Design Features: The 4-link air suspension removes your factory leaf springs entirely, using four heavy-duty steel trailing arms to secure the axle, with the air bags holding up the truck.

Benefits: The ultimate combination of ride quality and towing improvement. Also allows truck to drop 3.5 to 4 inches below ride height for easy trailer hitching, cargo loading, or garage clearance

Installation: Full suspension replacement

Not sure which one is best for you? Reach out to our team today and we’ll help you decide.

Are you looking for more height on your truck? Explore our wide selection of best-in-the-market air lift kits.

Get a Closer Look at How It Works:

Explore Stock Height Air Suspension Products For

GM 4500 Front Kit

GM & Chevy Trucks

RAM Trucks

Ford Trucks

2020+ Ford F-53 Chassis 2-Stage Front Air Suspension

RVs & Trailers

1987-2007 Peterbilt 379 Front Air Leaf Suspension

Semi Trucks

Comparison: Kelderman Suspension Systems vs. Add-On Helper Bags

Most air suspension products you’ll see on the aftermarket are basic add-on helper bags. While they may help level out heavy loads, they don’t give you the ride comfort you get with a Kelderman Air Ride.

Feature Add-On Helper Bags Kelderman 2-Stage Air Suspension Kelderman 4-Link Air Suspension
Factory Leaf Springs Kept in place Kept in place Removed completely
Empty Ride Quality Stiff & bumpy Smooth & cushioned Plush (floats 100% on air)
Height Adjustment None Limited Kneels 3.5-4 inches for easy trailer hitching
Core Design Air bag squeezed over factory leaf pack Air bag framework attached to leaf shackle Heavy-duty 4-link steel control arms

How to Get Your Air Suspension Installed

We make upgrading your truck’s suspension easy. You have multiple options to install our products on your truck, from using our own installers to your own trusted technician.

1. Ship to Your Preferred Local Installer 

We ship your complete air suspension system directly to any qualified shop or dealer in your area. Find your nearest Kelderman dealer here. 

How it works: Simply contact your local dealer to order the parts and schedule the installation.

2. Factory Installation at Kelderman HQ (Oskaloosa, IA)

Bring your truck directly to where our systems are designed and built! Our factory-trained technicians will perform the complete installation right here at our headquarters in Oskaloosa, Iowa.

How it works: Schedule your installation appointment with our sales team when placing your order. We are able to help coordinate vehicle transportation, and you can drive your vehicle to us or have it shipped. We offer a shuttle service to the Des Moines airport, loaner cars, and can assist with finding hotel and camping accommodations.

3. DIY / Self-Installation

Are you a confident DIYer with a well-equipped garage? Kelderman stock-height systems are engineered as direct bolt-on setups that use your truck’s existing factory frame mounting locations.

How it works: Every system comes with step-by-step PDF instruction guides and direct access to our technical support team if you ever have a question.

Our Air Ride Suspension Is for More Than Just Pickups

We have kits available for your chassis cab work truck, trailers, and even your motorhome. We have options available for tandem and triple axle leaf spring or torsion axle applications. 

The 2-stage air suspension kits are also available for many different motorhome applications, including:

  • Ford F-53: Front & rear available
  • Ford E-Series: Rear available
  • Mercedes Sprinter: Rear available

These rough-riding motorhome chassis have been used for decades, but the rough ride doesn’t have to last. Find out what Kelderman has available to make your next trip a smooth one.

2020+ Ford F-53 Chassis 2-Stage Front Air Suspension

Why Truck Owners Choose Kelderman

55+ Years of American Engineering

Every Kelderman air suspension is proudly designed, built, and tested right here in Oskaloosa, Iowa.

Proven Technology

Our vehicle-specific 2-Stage and 4-Link designs are created by our engineering team specifically for your make and model of truck, trailer or RV.

No Compromise on Towing

Unlike aftermarket lifts or soft springs that squish under pressure, Kelderman systems are built with industrial-grade steel and heavy airbags to meet or exceed your truck’s OEM towing capacity.

Expert Factory & Dealer Support

From direct factory installations at our Iowa headquarters to our nationwide network of preferred installers, our technical support team is always just a phone call away.

Find Kelderman Air Suspension Kits, Accessories, and More for Your Vehicle

Choose your year, make, and model to find Kelderman products that fit your vehicle.

2023+ Ford F-450/F-550/F-600 4X4 Chassis Cab 3" Air Suspension Lift Kit

Frequently Asked Questions

If your truck squats under a heavy load and you want to level it out, you’ll love one of our full-air suspension systems. When equipped with one of our optional self-leveling air control systems, your truck will sense a change in weight and pull air from the onboard air tank to return the suspension to the original ride height. 

Important note: While the kit will improve your towing experience, it’s important to continue to abide by the load ratings provided by your vehicle’s manufacturer.

Yes. When equipped with one of our optional self-leveling air control packages, you will have a switch that will activate dump valves to release the air from the air suspension. Typically, a 4-link rear air suspension will allow you to get 3 to 4 inches below ride height to help with loading things in the truck bed, hooking up trailers, and more.

Are you looking to raise your truck above stock height? Check out our full selection of lift kits.

The answer depends on which Kelderman product you’re using. Our 2-stage rear air suspension kits can be driven when deflated. At worst, it will ride like a factory truck.

However, a 4-link rear air suspension can only be driven deflated for short distances. With the suspension fully deflated, your truck will be resting on the bump stops within the airbags. Driving on these will result in a very harsh ride. Being fully deflated will also change the position of your axle and the pinion angle of the truck. You can lower the suspension and back under your trailer, park in a garage, etc., but then you will need to return the suspension to “ride height.”

Yes. Your leaf springs keep the rear end of your truck centered while traveling down the road. If you remove your rear leaf springs, you need a suspension that will keep the suspension in place. Our 4-link suspensions use adjustable trailing arms, as well as an adjustable panhard bar, to keep the rear end from moving forward and back, as well as side to side.

We offer 2-stage front air suspensions for many four-wheel drive trucks and several two-wheel drive applications. These stock height systems will typically remove the coil springs from the front suspension in favor of a full-air suspension system and new shocks. Some kits are also available in a leveling kit version for many trucks to allow for slightly larger tires and wheels.

We offer this suspension for nearly every kind of heavy-duty truck. These work on two-wheel and four-wheel drive models. We also have our general medium-duty air suspension kit – a very popular option for Internationals, Freightliners, etc. – for a class 6 or 7 truck with a 34-inch frame rail.

Your truck still features the leaf spring suspension, so you will still be able to tow to the factory ratings. Our 2-stage air suspension will simply provide you with a better ride while the leaf springs handle the towing duties.

Our air suspension framework will bolt to the end of the truck and then attach to the factory leaf spring pack. The leaf spring shackle hanger is removed during installation, so the rear of your leaf springs is now mounted to a moving air suspension framework. This provides additional travel for the leaf springs, resulting in a smoother ride. The design also allows the harshness of the bumps to be absorbed by the bags before being transferred onto the leaf springs.

Your truck still features the leaf spring suspension, so you will be able to tow to the factory ratings. Our 2-stage air suspension will simply provide you with a better ride while the leaf springs handle the towing duties.

Testimonials

“Had a single stage air ride on my F-350 installed at Kelderman’s facility yesterday. Drove my truck down from Minneapolis, and the ride was torture. Drove home two days later, and the ride was a dream. Kelderman’s is a top quality manufacturer with superior workmanship. If you want air suspension for your truck, these are the people to see.”

Doug Stanley

“Kelderman Manufacturing installed their air suspension unit along with a steering stabilizer on my 2016 Winnebago Sunstar with a Ford F53 chassis. After the installation when we got back on I-80 I could tell the difference immediately. The ride and steering was noticeably improved. I am planning to return to Kelderman Manufacturing to have the rear air suspension installed along with a front and rear stabilizer.”

Jeff Oppenheim

“This system has been an absolute game changer for our fifth wheel. 20,000 pounds rolling down the road on shackles, equalizers, and leaf springs was just not safe with the record the RV industry has had with frame materials and shoddy welding. Thank you for everything you guys do!

Five Star Nomadic

“We haul very close to our max GVWR on a daily basis seeing 5 to 8 dealers a day so the truck experiences a work load on a daily basis. Before the Kelderman suspension was added you could feel so much of the road. After we added the Kelderman it feels as if we are on a cloud. It was amazing to me that while we felt like we were on a cloud, the truck, for its weight, handles great!! Great job Kelderman!! This type of workmanship is why we are coming back to put your kit on our 44’ New Horizon Toy Hauler.”

Brad Ekstam

“Big thanks to Kelderman for an awesome product. We installed their (four-link rear kit) on a truck for the USMC. We will definitely be using Kelderman products again in the future!”

Kenny Belt

Wit’s End Fabrication

“We added the Kelderman Air Suspension to a new Turtle Top Limo Bus built on a Ford E-450 chassis. I have demonstrated this bus to three people with great results. It virtually eliminates all of the bumps that you get on I-1 between Slidell and New Orleans. This road is one of the worst and it really made a difference. The customers that rode with me could not believe the difference that it made. We use other ride enhancements, but nothing close to this system. I can’t wait to put this system on a paratransit bus for a high end retirement home.”

Sam Gibson

“Night and day difference (in ride quality). It rides about the same as a 2500 does now. Maybe between a 1500 and a 2500. It’s definitely better than the 2007 3500 I had (Ram 5500 front and rear air suspension).”

Bill Leider

“I had previously installed Mor/Ryde and Koni shocks on my 2010 F53, but this is so far superior. We just had install done on our new WInnebago and love to drive it. The ride is beyond fantastic. (Ford F53 Front Air Suspension)”

Bob West

Shop Our Stock Height Products

Browse our online store to find the Kelderman Air Suspension product that’s right for you!