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King Pin Adapter

Posted: Mon Nov 27, 2017 10:02 pm
by Traveler
Has anyone used one of these adapters to pull a gooseneck livestock trailer behind a semi? Is there any reason not to?

https://www.kingpinadapter.com/buy-products

Re: King Pin Adapter

Posted: Tue Nov 28, 2017 4:28 am
by Brad S
Never seen one, but it looks cool. Might have to move the plate on the semi back so the trailer doesn't rub.

Re: King Pin Adapter

Posted: Tue Nov 28, 2017 2:44 pm
by Traveler
I was wondering if there'd be a problem with the fifth-wheel plate tilting, like under acceleration and braking? Was wondering about maybe having a larger ring/base welded around the 7" base it's on. Maybe I'll order it and see what happens.

Re: King Pin Adapter

Posted: Tue Nov 28, 2017 6:17 pm
by Big Muddy rancher
Poor web site, on this page it says "If you have a offset hitch you may need to block the back of the fifth wheel.
https://www.kingpinadapter.com/c-work

Re: King Pin Adapter

Posted: Wed Nov 29, 2017 9:09 am
by badroute
I had one similar to that to pull my 24 footer behind my single axle semi. The only problem with it was my fifth wheel plate was quite high and the plate constantly rocked when coming to a stop and tilting back when taking off. It sure seemed like it was hard on my stock trailer hitch. I eventually sold it and welded a plate with a ball on it behind the fifth wheel plate on the frame of the semi and it was the right height for the trailer. This product is a good idea but just didn't work for my set up.

Re: King Pin Adapter

Posted: Wed Nov 29, 2017 6:41 pm
by Traveler
I appreciate the replies.


badroute wrote:I had one similar to that to pull my 24 footer behind my single axle semi. The only problem with it was my fifth wheel plate was quite high and the plate constantly rocked when coming to a stop and tilting back when taking off. It sure seemed like it was hard on my stock trailer hitch. I eventually sold it and welded a plate with a ball on it behind the fifth wheel plate on the frame of the semi and it was the right height for the trailer. This product is a good idea but just didn't work for my set up.
Good to know, before it got ordered.

Re: King Pin Adapter

Posted: Wed Nov 29, 2017 10:28 pm
by jedstivers
For dump trailers we have to block the fifth wheel in place to not move.
I think I'd rather but a ball in behind the fifth wheel and also have it lower if needed.
Would be real easy to add it on.

Re: King Pin Adapter

Posted: Fri Dec 01, 2017 7:21 am
by Denny
Just order a king pin assembly that slides up into your coupler pipe that is what we sell when guys want to pull with a king pin set-up.

I looked at the website and the pictures look like they cut the shank off a ball and welded it to a king pin. Not safe in my opinion.

Guys I've talked to that have these did'nt like them to much play between the ball and king pin made for a jerky ride.

Check out Redneck Trailer Supplies if you do want one as the quality will be there in the product.

Re: King Pin Adapter

Posted: Fri Dec 01, 2017 11:07 am
by Traveler
Thanks again. Sometimes it's just as valuable finding out what not to do, as what you should do.