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Heavy-duty 5th-wheel trailer hitch has interlocking jaws, a torsion head, and a color-coded lock indicator for safety and security. Non-binding slider ensures proper clearance during slow turns. Rails and universal installation kit sold separately.
Features:
Specs:
Unlike slide-bar models, the rounded, interlocking, two-piece jaw on this fifth-wheel trailer hitch inhibits rattle and movement by securely wrapping around your trailer's king pin, resulting in easier hookup and a safer, quieter ride.
Get peace of mind with Curt's color-coded lock indicator. Just look at the indicator - either the one on the handle or the one on the hitch itself - to determine whether the jaw is in the correct position to uncouple (red), couple (yellow) or tow (green).
Most often used on trucks with 6' and 6-1/2' beds, this slider helps to eliminate clearance problems during slow-speed turns. When you are towing a fifth-wheel trailer, your hitch must be situated on the cab side of your truck's rear axle. However, at slow speeds you can use a slider to slide the fifth-wheel hitch (and the trailer) toward your truck's tailgate and past the rear axle, creating enough space between the cab of your truck and the trailer to permit less-restricted turning.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everyone, Aiden here with etrailer. Today, we're gonna be taking a look at and showing you how to install the Curt A20 fifth wheel hitch with the S20 slider. This is going to be a full kit that drops into your ISR rail system and it's gonna give you a 20,000-pound towing capacity. Now, why you might want a kit like this is if you've got a truck bed that's shorter than eight feet. Not recommended for anything shorter than six feet. But in that range there, where your bed is a little bit shorter and you find yourself maybe with limited turning clearance for your truck and your fifth wheel, this can get you an additional 12 inches of clearance with the S20 slider, allowing the whole fifth wheel assembly to move back 12 inches, get you that additional clearance from your fifth wheel, and then move back whenever you're done getting that turning clearance.
Let's check it out. Now, as far as operating the slider goes, it is going to be more of a manual setup. But I do really like how the handle moves because when you grab it, you pull it towards you. So, it's really easy to get it activated. The one thing I will say against it is the pin and clip that holds that handle in this locked position here.
It's pretty tough to get out, but I found that if you go to the outside of it and just push (metal clanks) and kinda launch the whole thing back like that, it's the easiest way to get it out because of the way this plate is in the way. Once that's done though, we just pull this out towards us, very smooth and easy, and at this point, we drive forward. I'll just simulate it right now. This will slide back (truck bed thuds) and auto latch into this new position 12 inches back, giving us that additional clearance for our truck. Now, once we're done, we just pull that handle again.
And then whenever this returns to the normal driving position, it'll auto latch into place, and just remember that pin and clip to put it back in, and you're ready to go. So, everything's very easy and it locks in automatically on both sides. Now, comparing this handle to some other options out there, maybe like the B&W slider, that's gonna be very similar in the fact that it's a more manual slider. You have to come out and grab the handle to get it to slide back and then it'll lock in place. Now, I like this handle design a lot better, just because, like I said before, you're pulling it towards you.
Aside from that pin and clip there, it's very easy to operate. Whereas with the B&W one, you have to grab the handle like this and pull it back. So, you're not, at any point, moving it towards you and it can be a little bit hard to reach, depending on your truck and your height as well. I'm a fairly tall person, and this truck is at stock ride height, so I can reach this very comfortably. And as I pull it towards me, it only gets easier from there. So, it's just something to think about, depending on your truck and your height as well. Now, as far as the A20 fifth wheel head goes, that's going to match the same 20,000-pound capacity for our gross towing weight as the S20 slider there, so you're really getting the most out of the whole system this way. And then it can support a maximum vertical load of 5,000 pounds. So, that's something to keep in mind. You do wanna check your truck as well and see what it can handle and make sure you're going by the lowest rated component in your system. The A20 uses a dual-jaw design, which will close around the kingpin and you can see here the jaws overlap with each other like that. This gets us 360 degrees of contact around the kingpin for a very solid fit. You can operate those jaws by coming to the outside of the fifth wheel here, where we've got our handle, held in place by another one of these pins and clips. This one being much easier to operate. And you can even swap this one out for a padlock to keep people from messing with this when you're not around. But with that removed, we can pull the handle out and back, and looking at the jaws, (metal clanks) you'll see them spring open. Now, I'll grab a dummy kingpin right here and simulate as we're backing up to our trailer, it'll go in between those jaws, pull back and latch into place. The handle snaps back in and all we gotta do is resecure it with our pin and clip to keep it from moving. But here, we've got our full contact, being made on the kingpin, nice and secure. Now, you probably noticed, as I'm messing with the fifth wheel here, that the head has a lot of movement, and that is by design. The torsion system inside is going to help give us movement side to side, front to back, and really just all around 360 degrees. Definitely getting more of that in the side to side and straight, front to back range, but it's going to help for a number of things. As we're hooking up, if we're not perfectly backed up to our fifth wheel, these jaws will guide our kingpin in and then the head can flex to meet it. So, if we're not perfectly backed up, it can help with the initial hook up process, but it'll also help with shock absorption whenever we're going down the road, keeping that chucking to a minimum and helping to keep the noise down as well. And with that dual-locking jaw, we've got an indicator on the backside of the fifth wheel here, letting us know whether we have a positive couple ready to tow, we're fully open or not fully latched. So, this will move and change as I open up the handle and the jaws here to let us know if we're ready to go or not. That's really nice because it's located on the back where we can see it from inside the cab, too. With this setup, we've got a variety of different heights we can set our hitch at. We've got ours just above the very lowest setting right here, and we'll talk about that more during the install process, but we can set this anywhere from 17 1/2 inches, from the truck bed to the top of the fifth wheel, all the way up to 21 1/2 inches. We've got four points of adjustment here, each being an inch apart. The full kit here is gonna be steel construction, from the sliding base to the fifth wheel head itself. All of that also has a carbide powder coat finish on there to help it resist rust and corrosion over time. Now, with that being said, no coating is perfect and it can be susceptible to scratches. And if it scratches that coating away, then you are a little bit more prone to rust and corrosion. Luckily, for one of the points of contact here, being the top of the fifth wheel head, you are given a lube plate that will slide between the pin box and the fifth wheel head, reducing metal on metal contact and keeping this whole surface looking new for longer and helping resist scratches and scuffs. Something else you can do to keep things operating smoothly is by applying grease regularly to the zerk fittings on the jaws, as well as applying grease to the slide bars on the slider here. This will help keep things operating smoothly over time. One thing I will say is, with the sliders in particular, being a little bit more exposed, just watch for that grease and make sure it's not collecting too much debris and regularly apply it as needed to make sure things are running smoothly without binding. Now, getting this all installed is very straightforward. You will need your industry standard rail system here to drop into place, but aside from that, you get everything you need. The slider itself comes out of the box ready to just drop in place and include with all the pins and clips. The main head of the fifth wheel here comes fully assembled with the body and the head, but it can be separated using this small pin and clip and this large pin through the center of it. And that will let you separate the head from the body. This makes the installation process a lot easier because this makes it everything a lot lighter. You will probably need a second set of hands, though because the slider base is quite heavy. And once you get everything torqued down, if you wanna remove it after the fact, you probably don't wanna fully remove those bolts and then have to retorque them again. Luckily, you've got handholds on the slider base, so with an extra set of hands, it should be an easy process, getting it in and out of the bed. Speaking of that install though, let's walk through the whole process with you now. Before you drop the slider base in, your kit does come with these rubber isolators that's gonna help reduce metal on metal contact and reduce noise. We're just gonna drop those in place right now on our ISR rails. And with these, you've got the two holes on the side and the slotted hole in the middle. That's where we're gonna line all four of those up with and then we can drop it in place. One thing to note is that you will need an extra set of hands because it is quite heavy, especially on the side with the slider, but it comes ready to drop in right out of the box and with plenty of convenient handholds. So, we'll just drop that in. (truck bed thudding) (metal squeaking) With the base in place, we can get our pins and our clips, slide those through the tabs in all four corners and then attach our fifth wheel. (metal clanks) It comes pretty much fully assembled in the box. You will need to attach the handle to the head, but I chose to also separate the head from the main body here, just to lighten the load a little bit and make it easier to attach. For our application today, we're attaching it to our sliding base here, the S20. So, I'm just gonna get it dropped in place and then loosely get these bolts installed, line them up through the outer holes at whatever height setting we want, (metal clanks) and then attaching the nuts on the inside. (bolt squeaks) (nut squeaking) And at this point, once you've got it set to your proper height, you can tighten it down and torque it to the specifications found in your instructions. (metal clanking) (wrench tool clacking) (metal clanking continues) If you don't have a torque wrench at home, they are pretty easy to rent, or you can find them here at etrailer. (torque wrench clacking) (torque wrench beeps) And repeat that process for all your other hardware. And then the head simply drops in place in the center and secures with the large pin, feeding in through the back to the front. (metal clanks) And then secures in there with this pin and retaining clip at the front. (retaining clip clicks) Now, you're ready to hook up. And as for the A20 fifth wheel hitch with the S20 slider kit, that's really all there is to it. Overall, I think it's a very solid system. You're getting pretty much the maximum out of the S20 slider that you can. If you don't need 20,000 pounds of gross towing weight, you can get some more light-duty kits that use that S20 slider still, just using the A16 or the E16 head from Curt. If you need more weight capacity, you can upgrade to the S25 slider with the A25 head. Functionally, all these kits are gonna be pretty much the exact same thing. It's really just down to what weight capacity is gonna work best for you. Aside from that, if you already have the fifth wheel head and you're just looking to get a sliding base, you can get the sliding base separately. Just make sure you get the right one for your existing fifth wheel head. And really, that's all it comes down to, is just getting the right thing for your whole setup. But I think if you're starting from the ground up, you're looking for a slider with a fifth wheel head, then this option from Curt is going to be a really solid, middle-of-the-road option in terms of weight capacity, but also be very easy to use. Thanks for watching.
Ratings & Reviews

Brooke M.
2/5/2025
Cammi is going to love to see this review, Scott. Thanks for taking the time to write it! Ill be sure she gets to see it, and Im so happy to hear installation went off without a hitch! ;) Please let either me of Cammi know if we can help you out with anything else!

Scott
2/2/2026
My hitch is working great still. Easy to use no issues.

Gwendolyn Y.
4/17/2025
The New hitch looks great in your truck, Frank! Have you taken it out for a spin yet?




Matt
7/9/2026
One year and zero issues after many trips pulling our 43ft toy hauler.

Gary
4/29/2025
The fifth wheel has been amazing and doing a fantastic job! Top class product

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Harvey
4/8/2026
This was a great purchase and it’s made backing into tight camping spots so much easier. 100 satisfied with this hitch and slider system!