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Can Reese Goose Box be Used with CM Aluminium Flat Bed with Recessed Gooseneck  

Updated 11/05/2024 | Published 08/04/2020

Question:

I have a 2019 CM Aluminum flatbed with welded recessed gooseneck hitch on a 2015 Ford F-250 short bed. The recessed box dimensions are 15” x 15” x 4.5” and the hitch is a welded in BandW that the top of the recessed 2-5/8inch ball is 1-1/8” below the aluminum deck measured with a straight edge across the deck and tape measure. I have a 42foot 5th wheel rv with a Trailair 18K 5th wheel pin box air ride. I spoke with Demco about their recessed gooseneck adapter part number DM8550046, but they said that the top of the ball needed to be be within 13/16inch from the deck. What are the options for this situation? Would a Reese Goosebox fit and/or are there other options that would maintain the RV warranty?

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Expert Reply:

The dimensions of your recessed area are compatible with a Reese Goose Box like part # RP85FR. We've asked Reese about this in the past and they've told us that the recessed area needs to be at least 15 inch by 15 inch and no deeper than 5 inches. So what you have is perfectly compatible.

The Goose Box is only option that is compatible with RV frame warranties as well.

expert reply by:
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Jameson C
Jesse profile picture

Jesse

10/22/2024

Hello, I have a similar setup. I have a CM flatbed with a 13.25x13.25 recessed pocket, the ball sits 1 1/8 below the flat deck. Will a Reese Goose box work for my application? If I need more clearance could I add a 2" taller ball? I have some pictures I would like to have someone look at.

Kevin C. profile picture
Etrailer Expert

Kevin C.

11/5/2024

@Jesse I spoke with Reese and their tech stated that they recommend the opening be 16" x 16" but I believe that's just a general guide. If you can tell me what the measurement is down from the bed to base of the hitch ball I can see just how wide the # RP85FR is at that depth. From there we can see if an extended height hitch ball would be needed.

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