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Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Round - 25,000 lbs - BD0289640300

Retail: $222.13
Our Price: $211.60
In Stock
Pull your gooseneck trailer with a fifth-wheel hitch by installing this round gooseneck-to-king-pin adapter. Inner tube fits most standard, round gooseneck coupler outer tubes.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • Bulldog
  • Not Shock Absorbing
  • Adapts Trailer
  • 25000 lbs GTW
  • No Extra Clearance

Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30K - KPG5-R30IP

Retail: $188.28
Our Price: $175.77
In Stock
King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Round inner tube is included.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • etrailer
  • Not Shock Absorbing
  • Adapts Trailer
  • 30000 lbs GTW
  • No Extra Clearance

Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Inner Tube - Square - 30,000 lbs - BD0289650300

Our Price: $199.69
In Stock
Pull your gooseneck trailer with a fifth-wheel hitch by installing this square gooseneck-to-king-pin adapter. Inner tube fits most standard, square gooseneck coupler outer tubes.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • Bulldog
  • Not Shock Absorbing
  • Adapts Trailer
  • 30000 lbs GTW
  • No Extra Clearance

Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Round - 25K lbs - KPG5-R25-IP

Retail: $153.47
Our Price: $143.74
In Stock
King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Round inner tube is included, heavy-duty load-bearing pin (GCPN-PIN) is sold separately.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • etrailer
  • Not Shock Absorbing
  • Adapts Trailer
  • 25000 lbs GTW
  • No Extra Clearance

Gooseneck to 5th Wheel Trailer Coupler Adapter - Inner Tube - Square - 25,000 lbs - KPG5-Q25-IP

Our Price: $187.14
In Stock
King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Square inner tube is included.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • etrailer
  • Not Shock Absorbing
  • Adapts Trailer
  • 25000 lbs GTW
  • No Extra Clearance

New Arrivals — From Our Shop to You!

Chosen by folks who live and breathe this, just like you.

New Arrivals — From Our Shop to You!

Chosen by folks who live and breathe this, just like you.

Kristin
Kristin etrailer team member
Kristin etrailer team member

15

Years

|

589

Installations

15,864

Customers Helped

Any questions? Chat us from Missouri

Trailair Air Ride 5th Wheel King Pin - Fabex 730, RBW 7019 - 21,000 lbs - UF35-946215

Our Price: $1,878.50
In Stock
Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Fabex 730
  • RBW 7019
  • 21000 lbs GTW

Ram Gooseneck to 5th Wheel Trailer Coupler Adapter Inner Tube - Square - 30,000 lbs - KPG5-Q30IP

Our Price: $238.95
In Stock
King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Square inner tube.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner Tube
  • etrailer
  • Not Shock Absorbing
  • Adapts Trailer
  • 30000 lbs GTW
  • No Extra Clearance

Bulldog Gooseneck-to-5th-Wheel Trailer Coupler Adapter - Round - 25,000 lbs - BD0289580300

Retail: $318.75
Our Price: $282.32
In Stock
Pull your gooseneck trailer with a fifth-wheel hitch by installing this round king pin adapter. Simply replace both the inner and outer tubes of the gooseneck with this unique coupler and you're ready to tow.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner and Outer Tubes
  • Bulldog
  • Not Shock Absorbing
  • Adapts Trailer
  • 25000 lbs GTW
  • No Extra Clearance

Replacement Kingpin Head for Curt CrossWing 5th Wheel

Retail: $197.95
Our Price: $149.95
Replaces the kingpin head for your Curt CrossWing 5th wheel hitch. Fits Curt CrossWing (16600 or 16602).Features: Replaces the kingpin head for your Curt CrossWing 5th wheel hitch Fits Curt CrossWing (16600 or 16602) Fits: Curt CrossWing 5th Wheel Hitch: 16600 and 16602
  • Head
  • Head Assembly
  • CURT
  • 5th Wheel Hitch

Curt Air Ride 5th Wheel Pin Box - Lippert 1621 & 1621HD - 21,000 lbs - LC158778

Retail: $1,701.93
Our Price: $1,296.48
In Stock
Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1621 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Lippert 1621
  • Lippert 1621HD
  • 21000 lbs GTW

Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs - LC328492

Retail: $2,176.04
Our Price: $1,642.48
In Stock
Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Lippert 1621
  • 18000 lbs GTW

Curt Flex Air 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs - LC369535

Retail: $2,062.95
Our Price: $1,646.77
In Stock
Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert 1621 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Lippert 1621
  • 21000 lbs GTW

Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 or 1621HD - 18,000 lbs - LC328330

Retail: $876.95
Our Price: $700.47
In Stock
This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 or 1621HD pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Lippert 1621HD
  • Lippert 1621
  • 18000 lbs GTW

Trailair Air Ride 5th Wheel Pin Box - Lippert 0719 - 18,000 lbs - LC179879

Retail: $1,705.98
Our Price: $1,192.06
In Stock
Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 0719 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Lippert 0719
  • 18000 lbs GTW

Curt Rota-Flex 5th Wheel Pin Box - Lippert 1116 - 19,000 lbs - LC176440

Retail: $1,087.89
Our Price: $716.11
In Stock
This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1116 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Lippert 1116
  • 19000 lbs GTW

Curt Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs - LC328329

Retail: $966.95
Our Price: $711.49
In Stock
This Rota-Flex pin box has a pivoting head with a built-in rubber compound that works to reduce chucking and absorb road shock, resulting in a smoother ride and less wear and tear on your trailer. Replaces Lippert 1621 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Lippert 1621
  • 21000 lbs GTW

Curt Flex Air 5th Wheel Pin Box - Lippert Rhino - 21,000 lbs - LC65VR

Retail: $1,993.68
Our Price: $1,982.70
Flex Air drastically reduces chucking, absorbs road shock, and minimizes bounce. The internal air bag and built-in strut work with the rubberized pivoting head to achieve a dramatically smoother ride. Replaces Lippert Rhino pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • CURT
  • Upgraded Pin Box
  • Lippert Rhino
  • 21000 lbs GTW

Trailair Air Ride 5th Wheel King Pin - Leland 7920 - 21,000 lbs - UF35-946208

Our Price: $1,617.47
In Stock
Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Leland 7920
  • 21000 lbs GTW

Trailair Air Ride 5th Wheel Pin Box - Lippert 1116 - 21,000 lbs - LC155943

Retail: $2,004.67
Our Price: $1,335.60
Enjoy smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with this air-ride-equipped model. An internal air bag and built-in strut absorb road shock so that you won't feel it. Replaces Lippert 1116 pin boxes.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Lippert 1116
  • 21000 lbs GTW

Trailair Air Ride 5th Wheel King Pin - Fabex 750, 765 and 770, RBW 7028 - 21,000 lbs - UF35-946212

Our Price: $1,799.66
Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Fabex 765
  • Fabex 750
  • Fabex 770
  • RBW 7028
  • 21000 lbs GTW

Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs - UF35-946211

Retail: $1,560.95
Our Price: $1,363.96
In Stock
Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Steelco-Davis PB02W
  • Steelco-Davis PB02
  • Venture CJ20517
  • Venture CJ20515
  • 21000 lbs GTW

Trailair Air Ride 5th Wheel King Pin - Steelco/Davis, Venture - 21,000 lbs - UF35-946219

Our Price: $1,567.57
Experience smooth, stable towing with your fifth-wheel trailer by replacing your ordinary pin box with an air-ride-equipped model. The scissoring action of the coupler allows the interior air bag to absorb road shock so that you won't feel it.
  • Absorbs Road Shock and Reduces Chucking
  • Lippert
  • Upgraded Pin Box
  • Steelco-Davis PB01
  • Venture CJ13517
  • Venture CJ13515
  • Venture Short
  • 21000 lbs GTW

Ram Gooseneck to 5th Wheel Trailer Coupler Adapter - Round - 30,000 lbs - KPG5-R30

Retail: $231.91
Our Price: $214.29
In Stock
King pin coupler allows you to pull your gooseneck trailer with a fifth-wheel hitch. The height easily adjusts to fit your application. Round inner and outer tubes replace the gooseneck coupler on your trailer. Load-bearing pin included.
  • Gooseneck Trailer to 5th Wheel Hitch
  • Replaces Inner and Outer Tubes
  • etrailer
  • Not Shock Absorbing
  • Adapts Trailer
  • 30000 lbs GTW
  • No Extra Clearance