5th-Wheel Pin Box

2015 Products Catalog
2014 Product Brochure1. View Flip Book Version
2. Download PDF Version

Products for All Types of Travel Trailers
Products for 5th Wheel Trailers
Products for Gooseneck Trailers
Products for Class C Motorhomes
Products for Class A Motorhomes
Products for Material Handling-Power Movers and carts
Products for Marine
Products for Rental Markets

Trailair® Pin Box - Model L05

Trailair® Pin Box - Model L05
  • Air Ride Pin Box
  • Smooth, stable towing
  • Scissors action, transfers shock to the air bag
  • Improves the overall ride while protecting the 5th wheel trailer
  • Improves handling and enhances towing performance
  • Available for most frames

Trailair® Pin Box - Model L05
Trailair® Pin Box - Model L05
Trailair® Pin Box - Model L05


For Other TrailAir Sizes and Capacities, select TrailAir from the Drop Down Menu below.

Trailair® Pin Box - Model L05 is available at most RV dealerships and RV parts and accessories stores. To locate a dealer near you, Click "Find Dealer" Tab above or to buy online from one of our Ultra-Fab Superstore retailers, click "Buy Now" button below.

Buy Now from Ultra-Fab Retailer

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.

The Trailair® Pin Box comes in three (3) styles and 21 variations. To determine which pin box you need click the link below:


Copyright © 2017 Ultra-Fab Products, Inc. ALL RIGHTS RESERVED Ultra-Fab Products, Inc.
57985 SR 19 S
Elkhart, IN 46517
Fax: 800-860-4980
Updated: August 21, 2017