The Trailair Air Ride Pin Box acts as a buffer between the tow vehicle and RV, arresting the impact of road shock and stabilizing the towing performance. How? Simple — the unique scissor action allows the air bag to absorb road shock and vibration while the gas shock handles the rebound or bounce effect, giving RVers a better, smoother ride.
• 21,000lb Capacity
• Bolt-on installation
• Standard 2" king pin
• Gas shock and air bag combination to absorb road shock and control back and forth coach movement, otherwise known as chucking
• Protects from damage caused by road shock and vibrations potentially saving owners costly repairs
• Improved ride
• Made in the USA
• Replaces all popular LCI pin boxes;16K (1621), 18K (1621), 21K long jaw (1621), 21K (1716), 18K (0719) and 21K (1116)
•» Do not use the Trailair air ride pin box with any type of gooseneck adapter.