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Air Suspension
A family owned business, Kelderman is the leader in air ride suspension lift technology for your truck or SUV, plus other options like bed lifts and non-lift air suspension.

Gary Kelderman and son Jeff Kelderman, the founders and owners of Kelderman Manufacturing, hold over 25 patents for everything from agricultural tools and machinery to automotive and motorcycle air suspension. With successful history in both drag racing and offroad racing including tractor pulling, the Kelderman family is sure to produce the toughest, smoothest working air ride suspension you'll find anywhere.

Kelderman Airbags are the only way to go for raised adjustible suspension. Give your truck a lift of up to 12 inches for on and off-road use, then lower it down so you and your passengers can enter and exit the vehicle with ease. With Kelderman Lift Kits you get the look gained by normal suspension lifts, plus added convenience and superior ride quality.
Kelderman believes your truck doesn't have to "ride like a truck". Premium ride quality, load leveling options, and increased payload is what you'll get when you install a Kelderman Suspension System on your Chevy, Dodge, Ford or GMC Truck or SUV. A great addition for those who spend a lot of time in there truck, whether for business of pleasure.
Kelderman Air Ride has developed a unique hydraulic bed lift for medium duty trucks. The system was developed to allow for easy loading and unloading of equipment that might not otherwise be possible to load and unloadin the tall bed of medium duty trucks.
Frequently Asked Questions

» Can I run the bags empty? It will not hurt the bags to run empty, but the ride will be very harsh. When the bags are empty, you probably will not be able to turn very sharp because the tires will rub on the lower rear part of the fenders.

» How tall can I run the bags? Running the bags completely topped out will not only yield a harsh ride, but typically put the pinion angles, driveline and alignment out of specs. It will ride harsh because there is no rebound if they are topped out. When the bags are all the way up, the front left tire will tend to be sticking out of the front fender well farther than the right front.

» Should the bottom of the bag be straight? Not being straight will not hurt the bags. Air bags are run in industrial applications up to 30 degrees. We try to keep the bags straight as possible, but the bottoms may be angled a little as the pinion angle of the axle is set. As far as up and down goes, the kits are designed for the bags to set pretty square. If your application has an adjustable panhard bar, use that to make sure the axle has the same amount sticking out from side to side. Once this is equal, the bags should be straight.

» Do the bags wear out? As long as the bags do not have anything rubbing on them, they should last for years. Periodically check your bags to make sure nothing is rubbing on them and no rocks or debris has lodged in between the air bags and steel framework. Be sure to thoroughly wash the bags after mudding. Blowing a bag should be no rarer than getting a flat tire.

» What should my bag's height be? Use the following chart to monitor your bags heights.

Bag Number Air Ride Height
8979 bag 6.5 inches 11-13 inches
5323 bag 4.5 inches 7-9 inches
9619 bag 10.5 inches 14-18 inches
5770 bag 4 inches 7-9 inches

» Do I need limiting straps? Unless you are planning on jumping your truck, limiting straps are not required. The only other time they would be helpful is if the truck is going to be lifted by a frame hoist/lift with the shocks removed.

» Can I blow up a bag? The bags are designed by Firestone to be operated at a maximum continuous pressure of 100 psi. The bags are also pressure tested to operate at over 300 pound spikes. With the air compressors that we use, it would be very difficult to blow up a bag.

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