The strongest, safest and most versatile King Pin Adapter made.

Each of these versatile adapters is adjustable in height from 12.5" to 16.5" to accommodate different height trucks and trailers.  Measure from top of ball to king pin plate.

• Now you can pull your RV trailer with a gooseneck ball.      
• Fits standard king-pin box.
• Self-latching GN8 2-5/16" coupler.
• Coupler is drilled for a pad lock.
• Precision coupler casting extends life of ball.
• Three different offsets for different applications.
• 4" height adjustment in 1" increments.
• Durable Powder coated finish.
• Easy bolt-on installation.
• 24,000 lbs. Gross Trailer Weight.
• 6,000 lbs. Gross Tongue Weight.

Each adapter is equipped with a PopUp GN8 Precision self latching coupler.  The coupler is drilled to accept a long shank padlock (not supplied).

Towing with a fifth wheel hitch is OK, but you can forget about using your truck for anything else! That massive hitch is always in your way.  A Fifth Wheel Adapter from PopUp gets that colossal hunk out of your truck.

An RV Adapter from PopUp lets you tow your travel trailer with any standard 2 5/16" gooseneck hitch ball. Use it with a PopUp2 or a Flip-over Ball and you can pull your RV trailer and still have a completely smooth fully usable truck bed anytime you want it.

To make your towing experience better yet, these RV Adapters are fitted with a PopUp GN8 self-latching coupler. This coupler latches when the trailer is lowered onto the ball. It also has a molded hitching guide to make coupling easier. To uncouple, you simply pull a release cable located near the trailer jack handle. The GN8 coupler has a rating of 28,000 pounds.

The Adapter is held securely to the trailer king-pin box with a strong king-pin clamp. It also bolts to the king-pin box for additional stability. The installation fasteners provided are Grade 8. Installation takes about an hour.

The unit is built strong with a gross trailer weight of 24,000 pounds and a gross tongue weight of 6,000 pounds.

Adapters are furnished with a long lasting powder coated finish, and comes 100% complete.

When you uncouple, the Adapter stays with the trailer giving you full use of your truck bed for the other jobs you need to do.

                                       Two 9" offset adapters for flatbed trucks.   

RV4 & RV4XL         

RV4 with 7 1/2" fixed height and 4" from top of ball to bottom plate.

RV4XL with 11 1/4" height and 7 3/4" from top of ball to bottom plate. The difference is a longer tube from the coupler to the bottom plate.

The RV4's are designed for use with flatbed pickup trucks.  They do not offer enough clearance over the side rails for standard pickup beds.

• Now you can pull your RV trailer with a gooseneck ball.
• Fits standard king-pin box.
• Self-latching GN8 2-5/16" coupler.
• Precision coupler casting extends life of ball.
• 9" offset for more trailer swing, added maneuverability.
• 7-1/2" or 11 1/4" fixed height for flat bed trucks.
• Black Powder coated finish.
• Easy bolt-on installation.
• 24,000 lbs. Gross Trailer Weight.
• 6,000 lbs. Gross Tongue Weight.

Choose the one that is right for your truck / trailer combination.   Both mount to the king-pin box using the same strong machined steel king-pin clamp used with the RV1, RV2 and RV3.