Air Pin

US Patent #5,785,341

Lose the jiggles, bumps, chucks and jars with the 5th wheel Air Ride Pin Box. By adding an air bag at the hitch connection, you, your towing vehicle and the coach enjoy smooth, stable towing performance.

How Does It Work?

The beauty and reliability of the Trailair® air ride systems is their simplicity. The air ride pin box acts as a buffer, arresting the transfer of road impact between the tow vehicle and the coach to produce smooth, stabilized towing performance.

Generally, a truck and a trailer connected by a ridged hitch system (basically any standard fifth wheel or ball connection) will tend to fight each other as you travel at highway speeds. The faster you go and the worse the road conditions, the more the ride quality suffers. Not only are you dealing with road forces from traveling down the road, but also additional forces are created as the two vehicles fight each other causing a "diving board" effect. The Trailair® coupler's unique scissor action allows the air spring to absorb these forces and dissipate them and for the shock absorber to handle the rebound effect. The result is an improved ride for the truck and it's occupants, the coach and its contents.

Simple Advantages

• By cushioning the hitch area, the pin box coupler component can potentially reduce warranty and repair concerns associated with substructure cracking and leaking caused by road impact.
• Interior amenities and components— which have continued to escalate as fifth wheels— grow in size and price, are better protected.
• RVers gain a "life enhancement" because the coupler yields an over-all improved towing experience.
• Owners receive a Life Enhancement
• Your satisfaction is guaranteed or your money back.

Which Air Pin Pinbox Is Right For You?

Many RV manufacturers buy pin box assemblies from other manufacturers that specialize in this field. If we can determine the exact make and model of yo coach, we probably already have a fit-up model.

Some of the names to look for on your pin box are Fabex, Leland, Lippert, Venture, RBW and Atwood, to name a few.If you have that information, you can determine which Pin Box is right for you.

Because the wide variety of manufacturers and the many years that fifth wheel coaches have been built, Trailair® does not have a replacement pin box already configured for every coach ever made.

If an identification is not clear on the pin box stating the make and model of the pin box, then we may be able to match a Trailair® air ride pin box based on style, width, length and bolt pattern by using one of the Trailair® multi-fit designs that are drilled on site on the coach.

The RV industry utilizes 4 basic pin box styles: Long, Medium, Short, and Telescoping. Each style has various dimensions and bolt patterns, depending on the manufacturer of the pin box.