{"product_id":"lippert-components-158778-lippert-trailair-air-ride-pin-box-21000-lb-5th-wheel-king-pin","title":"Lippert Components 158778 Lippert Trailair Air Ride Pin Box, 21000 lb 5th Wheel King Pin","description":"\u003cp\u003eThe Lippert 158778 Trailair Air Ride Pin Box is a premium upgrade designed to improve towing comfort and reduce stress on your fifth wheel trailer and tow vehicle. Engineered with an advanced air bag and gas shock system, this pin box absorbs road shock and minimizes fore-to-aft movement (chucking) for a smoother, more controlled ride.\u003c\/p\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eWith a 21,000 lb gross weight capacity, this air ride pin box is built for durability and performance. It is designed as a direct replacement for Lippert 1621 pin boxes, making installation straightforward while delivering immediate improvements in ride quality and trailer protection.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number (MPN):\u003c\/strong\u003e 158778\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Line:\u003c\/strong\u003e Trailair® Air Ride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Air Ride Pin Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoupler Type:\u003c\/strong\u003e King Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGross Weight Capacity:\u003c\/strong\u003e 21,000 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 28-11\/16 Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 12 Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Pattern:\u003c\/strong\u003e 2 Row\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorizontal Bolt Spacing:\u003c\/strong\u003e 7-3\/4 Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVertical Bolt Spacing:\u003c\/strong\u003e 2 Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Powder Coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKing Pin:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKing Pin Locking Wedge:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKing Turret:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurret:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpacers:\u003c\/strong\u003e Not Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAir bag and gas shock system absorbs road shock and vibration\u003c\/li\u003e\n\u003cli\u003eReduces chucking (fore-to-aft movement) for smoother towing\u003c\/li\u003e\n\u003cli\u003eImproves ride comfort and driver control\u003c\/li\u003e\n\u003cli\u003eHelps protect RV frame and contents from damage\u003c\/li\u003e\n\u003cli\u003eDesigned as a direct replacement for Lippert 1621 pin boxes\u003c\/li\u003e\n\u003cli\u003eHeavy-duty steel construction ensures long-term durability\u003c\/li\u003e\n\u003cli\u003ePowder-coated finish resists corrosion and wear\u003c\/li\u003e\n\u003cli\u003eProvides a smoother, more stable towing experience\u003c\/li\u003e\n\u003cli\u003eFitment Notes\u003c\/li\u003e\n\u003cli\u003eDesigned to replace Lippert 1621 pin box configurations\u003c\/li\u003e\n\u003cli\u003eCompatible with fifth wheel trailers using standard king pin couplers\u003c\/li\u003e\n\u003cli\u003eVerify bolt pattern and mounting dimensions before installation\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for optimal performance\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lippert Components","offers":[{"title":"Default Title","offer_id":48298299916494,"sku":"14-0688","price":2112.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3785\/6462\/files\/ImageServerAPI_9_2351753c-0f72-41c7-8a5a-77dae47a45f3.jpg?v=1787077236","url":"https:\/\/newrvparts.com\/products\/lippert-components-158778-lippert-trailair-air-ride-pin-box-21000-lb-5th-wheel-king-pin","provider":"New RV Parts","version":"1.0","type":"link"}