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This shock-absorbing pin box provides a smooth, safe ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. 4.5K pin weight.
Features:
Specs:
Notes:
| Calculated Pin Weight | Executive Pin Weight Capacity Required |
|---|---|
| 1,600-2,599 lbs | 3,500 lbs |
| 2,600-3,599 lbs | 4,500 lbs |
| 3,600-4,599 lbs | 5,500 lbs |
| 4,600-5,599 lbs | 6,500 lbs |
| 5,600-6,599 lbs | 7,500 lbs |
| 6,600-7,599 lbs | 8,500 lbs |
| 7,600-8,599 lbs | 9,500 lbs |
If you've ever towed a fifth-wheel trailer before, you're no stranger to road shock. Driving over uneven terrain can result in a rigid, bumpy ride. And uncomfortable fore-and-aft chucking can occur when you're starting and stopping. When all of the motions combine, the road shock can even potentially damage your truck or trailer.
This Gen-Y Hitch torsion pin box is designed to absorb road shock at the connection point to create a safe, smooth ride. This is thanks to the internal construction of the box, which is similar to that of a torsion axle.
Pivot points are built into the Gen-Y pin box. This allows for movement between the box, which attaches to your trailer, and the king pin, which connects to the fifth-wheel hitch in your truck bed. When your trailer bounces or jerks, the king pin will move accordingly.
Built into the Gen-Y pin box are tubes with inner bars that are surrounded by rubber cords. As the king pin moves, these inner bars twist inside of the tubes, attempting to follow the pin's motion. But the rubber cords prevent the bars from twisting too far. And as each bar turns, these cords compress to absorb the rough shock. This means that any shock experienced by your truck can be absorbed before it reaches your trailer, and the shock experienced by your trailer won't get transferred to your truck.
Ratings & Reviews
Arrived as expected and had the installation completed in about two hours. My expert salesman saved me alot of misery because I had intended to order the wrong hitch and he corrected the error. Excellant service and really refreshing to work with people who really care.
Super fast shipping. Easy install. Heavy buggar so hired two young ones to hold it while I bolted it into place. Coming up into the 1000 mile usage mark and it is doing its job well absorbing road shock. In New York state now. PA roads are awful bumpy so it got several good tests.
etrailer is the absolute best to order from! The only thing I worst is I should have ordered the gooseneck one instead of the fifth wheel to get more bed space
Excelent king pin hitch, it takes 99% of the chucking out of the 5th wheel hitch.
I have a GD Momentum 395m. The tongue weight can very depending on the cargo in the garage on the back end. With that said, after 5000 miles, we have a noticeable difference in the ride and bouncing with the Gen-Y hitch making it more comfortable on some of the highways that are rougher than others throughout the US.
Hitch installed faster than I thought it would. Fit was great.
The benefits of an airbag hitch without the worry of air leaks. Drastically improves the the ride and drivability.
Thanks Gen-Y and etrailer
I installed the unit today. It appears to be well built. You should note that it is very heavy compared to a Rhino Box (120# v 50#). I inserted the pin box onto my fifth wheel hitch and then backed into place to mount it on the camper making it a one person job.
Some items to note…hardware is not included. GenY recommends grade 8 bolts. The original hardware was grade 5 on the rhino box. Also, I don’t like to retension high strength bolts, so I would recomend new grade 8 bolts. The rhino only had 10 bolts where I could get 12 in this one. Also note that the tag on the actual pin box says only good for 18000lbs (not 21000 as advertised). The tongue rating was as advertised 3.5k model) My camper is smaller so the 18000 lbs isn’t an issue.
Haven’t actually road tested yet, but I am confident it will improve ride.
WOW Not that I am surprised. etrailer knocked it out of the park again. From the knowledgeable fast and professional help from Representative Joanne K. My buying experience felt like I was buying from a friend. But then after the sale the follow through was unmatched. The GEN Y pinbox I ordered was not in stock but became available much earlier than promised and I got an email notifying me that in was in and being processed. Another letting me know that the item had shipped. Item arrived on time and very well packaged.Excited about getting the pinbox installed I was on my own with no one around. The install went Smooth and easy. Buying from a company that really cares about their costomers is getting to be such a rarity but etrailer went over and above to make my purchase fantastic. The GEN Y pinbox is well made and the fit and Finnish is beautiful. I can't wait to take it on our next trip.
I did receive the pin box right on time today and will be mounting it in next few days. I’ll let you know afterwards how it went, thanks for the follow up.
Randy
Just got my gen y king pin delivered today. It took 4 old men 1 hour to put on using my truck and hitch. Easy installation. I’m a full timer so next month we will see how it rides. I got the gen y because it is 3 inches lower than the rotoflex. It shouldn’t hit my tonneau rails. I’m anticipating being Abe to turn 90 degrees without the pin box hitting my side rails. And it looks tough.
Simple design, very robust construction, made a vast improvement in towing ride quality.
Easy install by myself, Engine hoist, utility cart and motorcycle jack...ya I have "stuff".
I will need to lower my B&W slide about 2inches to get back to level towing. Calculator that Gen Y has for selecton is spot on , I was a bit worried as my measured tounge weight was 2700 +/- lbs 22% of GVWR (14,400) was 3168 so I ordered the 4.5k model
When hiched for the first time...indicator was in the middle of the green (perfect).
Very happy ... next Im adding shock absorbers to see if i can smooth the trailer hop a bit more.
Excellent product. Wish I had installed it sooner. Easy to hook up and towing is much smoother!!!
We went for a 150 mile trip into the Adirondacks for a 3 day vacation and I thought the hitch worked great. We will really test it this winter on a 5000+ trip out west.
I tow with a f-450 this hitch took away the rough ride. Long term probably will save many problems. Well worth the money.
The Gen-Y hitch is well built and was easy to install. I haven't towed with it yet, but My expectations are very high that it will perform as advertised.
I really can’t tell you anything, have put it on my trailer but haven’t pulled the trailer yet, but a very nice hitch, can’t wait to pull with i
This is exactly what I was wanting. Went on easy. Great fit. Fast shipping!
We finally got a chance to take the RV out about a 500 mile road trip at first I had my doubts it Chucked real bad right out of the gate but less than 100 miles and it felt pretty good then on the return trip it worked really well. No checking at all. getting ready to take from California to Boston could probably give it a little better review at that time but so far it’s working out great
On a Montana 294RL after about 500 miles it reduced chucking and smoothed the ride. You can see it flexing in rear view mirror when you hit potholes and bumps. Stuff doesn't come off shelves anymore. Would not be good for toy hauler due to changing trailer weights. Used tractor with forks and a pallet to install. Needs two guys and a spanner wrench as well.
A lot better fit and more secure. Thanks William for all the help. Exact fit the first time.
Well made product that definitely absorbs some of the road shock transferred to the fifth wheel.
Paired with the curt cross wing and tows excellent makes a big difference definitely recommend this product.
I have now traveled several thousand miles with the Gen-Y hitch installed and have experienced little if any improvement from my old rhino box pin box. I think that once again I have been influenced by the on-line “influencers”, which proves that they have done what they were rewarded to do.
That being said the experience of ordering and shipment along with keeping me informed along the way by etrailer was top notch. I have always had good experiences with etrailer.
Installed myself with no problems but glad I had a tractor to help with the lifting.
Mike L.
10/28/2025
Hi Michael. This particular pin box is designed for 5th wheels with a pin weight between 2,500 lbs - 4,500 lbs. What's the pin weight of your rig (GVWR X .22)?
Do you have a question about this 5th Wheel Pin Box?
Info for this part was:
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Brooke M.
6/20/2025
Sounds like you are batting a thousand! Glad William was able to get you to the right hitch. :) When do you get to put it to use on the road?