Start towing your fifth wheel with a gooseneck ball without losing comfort. A built-in coil spring smooths out bumps and cuts down on chucking. And with the bed cleared, your truck stays useful for gear or daily driving when you're not towing.
Switching from a fifth wheel pin box to a gooseneck coupler isn't just about changing the connection. With this setup you get the benefits of a gooseneck (a clear truck bed when you're not towing and a simple ball connection when you are) while also gaining a smoother ride. The coil spring softens the bumps you get with a rigid coupler. Plus, it'll take the edge off when you cross bridge joints and dips that usually set off back-and-forth chucking.
This pin box bolts directly to the Lippert Rhino pattern with included hardware and it's approved for Lippert frames, so you can install it without worrying about your warranty. It's heavy enough that you and a friend should handle the lift, and following the torque specs is key to getting it set correctly. If an extra set of hands isn't available or you're not comfortable doing this yourself, we can help you find a trusted shop to install it for you.
The auto-latching coupler drops onto your 2-5/16" ball. But, the cool part is that it'll lock in on its own. You just back in, line up, and it clicks into place. That saves time when you're getting ready to head out of the driveway. When you're ready to unhitch, the release is just as simple.
One of the frustrations with air-ride systems is checking the pressure or having to top things off. Or even worse, trying to find a leak. The coil spring design avoids all of that. There are no bladders to inflate and no valves to fail. It'll stay ready between trips, so you can just hitch up without adding more things to your checklist.
Notes:
Your trailer's pin weight is the amount of weight pressing down on your truck through the king pin. It's the key factor in choosing the right Curt Helux pin box since each model is tuned to a specific pin-weight range. If it's too light, the coil springs won't engage correctly, but if it's too heavy, you'll overstress the system. When this number is accurate, the pin box performs the way it was designed and gives you the smoothest ride possible.
The most reliable method is to use a set of certified vehicle scales (like CAT scales).
This process accounts for how your trailer is actually loaded, which includes cargo and water tanks, so you know you're picking a pin box that matches the conditions you're using it with.
If you don't have access to a scale, you can get a ballpark figure with your trailer's GVWR:
This method gives you a starting point, but remember it's only an estimate. The actual pin weight can change depending on how you fill tanks and distribute weight in the trailer.
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer. Let's take a quick look at this CURT Helux 5th Wheel to Gooseneck Shock-Absorbing Pin Box Adapter Now, this setup is going to replace your traditional fifth wheel pin box with a gooseneck coupler. That means an easy connection to your 2-5/16-inch gooseneck ball and a clear truck bed when it's time to haul tools, bikes, or other camping gear. Now, this upgraded coupler features this built-in coil spring that's going to smooth out bumps and cut down on that annoying back and forth chucking. So, this coupler is going to bolt directly to your Lippert Rhino pattern with the included hardware that you see here at the bottom of my table, and this is going to be approved on your Lippert RV frames, so you're not going to risk your warranty. Now, this does have a towing capacity of 20,000 pounds and a pin weight range from 1,550 pounds up to 2,700 pounds.
Now, on this product page, we do have steps that you can take to accurately measure your pin weight. So, if you're looking to figure out how to measure your pin weight, do take a look at those instructions on this product page. Now, the coil spring and shock system is going to help cushion road vibrations and help absorb those jolts from the potholes, bridge joints, and dips. And this is a big upgrade from those rigid couplers and it gives you a smoother, more relaxed towing experience. And unlike air ride system that need regular pressure checks and occasional repairs, this coil spring system is going to be ready whenever you are.
No air bladders, no valves to worry about, just reliable performance every trip. The auto-latching mechanism on this coupler here is going to make hitching quick and stress-free. You're just going to back in, line it up, and then it's going to lock automatically on that 2-5/16-inch ball. And then when it's time to disconnect, you're just going to release it with this cable. It's gonna be very simple.
Obviously, because of the weight of this unit, I'm unable to demonstrate the coupling mechanism on my table here. But when you're ready to release, we do have this cable here that you'll just pull, and then that will disconnect it from the ball. So, very easy to use. This is constructed of carbon steel with a slightly textured black powder coat finish, so I think it's gonna hold up really well for you. Again, the hardware is gonna be included to get this mounted into place.
We do have a grease zerk here as well. And then you're gonna get towing chains with this. So, you see the one here on this side, and then we got the towing chain on the other side as well. I do wanna mention that this is not going to be compatible with CURT RockerBall cushion hitch gooseneck balls, just so you're aware of that. But if you happen to have any other questions, whether it's about this or anything else that we carry here at etrailer, don't hesitate to reach out to us 'cause ultimately, we wanna make sure that you're getting exactly what you need. Well, again, my name is Andy. Thank you for joining me.
Ratings & Reviews
Easy to install. Works great. There is a noticeable reduction in chunking.
Glad the pin box was good. The box and pallet were damaged badly. Will be installing it tomorrow. I think it will enhance our ride while towing.
I received this curt helux pin box very quickly. I was impressed with how fast and how the shipment was handled. I've installed the pin box but haven't yet towed our 5th wheel yet. 1st camping trip later this month possibly. Maine weather needs to be a bit nicer. Anyway. So far very impressed with the product.
Seems very well made. I haven't towed with it yet. I'm very excited to try it.
This pin box is absolutely amazing. Way smoother pull way less chucking ! Highly recommended this over any stock pin box.
Great communication and quick to handle any issues
Install was easy, used my tractor to put in position. Only issue it didn’t come with the hardware, had to purchase new. Otherwise good.
I’ve only had my toy hauler out one since installing the hitch but went over a set of RR tracks and 3 bridges and it definitely makes a difference. Greatly soften the blows to the truck so you know it’s taking a lot of stress off the fifth wheel. Watched it workings through the rear view mirror. Simple design that someone should have come up with long ago. Took a friend of mine and I exactly 1 hour to install withe the help of his motorcycle jack on the tailgate of the truck. It’s heavy and well built. They are a little pricey but I feel well worth it for the longevity of the frame. Most importantly know the weight of your trailer loaded to pick the right one
Purchased over one month ago, I waited until I had towed our 40’ fifth wheel before rating and reviewing the Curt Helux, which replaced the OEM Curt Rota Flex. What a difference! We towed nearly 500 miles and it was the smoothest tow we have had in three years. Very little chucking was encountered even though the interstate had the usual rough bridges and construction. Installation was relatively easy-just follow the instructions-since it was a Curt product being replaced. ETrailer’s service was excellent as well.,
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