A 5th wheel pin box is the connection point between your trailer and your truck’s fifth-wheel hitch. Upgrading your pin box can significantly improve ride comfort, reduce chucking, and improve towing stability. At California RV Specialists, we install premium pin box upgrades from leading manufacturers including MORryde, Lippert, CURT, Gen-Y, and Reese.
Why Upgrade Your Pin Box?
- Reduces jerking, bucking, and “chucking” when traveling
- Improves ride comfort for both the truck and trailer
- Helps reduce stress and wear on frame, hitch, and suspension components
- Increases towing confidence, especially on long hauls or uneven roads
Choosing the Right Pin Box
Every RV is different. Before purchasing, compare models, read other RVer experiences, and choose a pin box specifically designed for your RV frame and towing needs.
Upgrading to a quality pin box can make a significant difference in your daily towing experience — and contribute to a safer, more enjoyable journey.
Types of Fifth Wheel Pin Boxes
Standard Pin Boxes
Basic pin boxes provide the kingpin connection to the fifth-wheel hitch.
Cushioned Pin Boxes
Some pin boxes include rubber, airbag, or shock-absorbing technology to reduce jerking and road shock during towing.
Rotating Pin Boxes
These move the pivot point rearward to improve turning clearance for short-bed trucks.
Gooseneck Pin Boxes
These replace the kingpin with a coupler that connects directly to a gooseneck hitch ball.
ROTA-FLEX – CURT
CURT® Rota-Flex™ 5th wheel pin box.
The Rota-Flex features a pivoting head that controls back and forth movement of the king pin within the hitch. Which reduces chucking and leads to a smoother ride.
AIR RIDE – CURT
CURT M15 Air Ride™ Pin Box.
The Air Ride incorporates an internal air bag and built-in strut that absorbs road shock and vibration. Which reduces chucking, jarring, and bouncing, providing a smooth ride.
FLEX AIR – CURT
CURT L05 Flex Air® Pin Box
The Flex Air features an internal air bag and built-in strut that both collaborate with a rubberized pivoting head. This reduce chucking and virtually eliminate bounce and jarring. Giving you a smooth ride that keeps things in control through the harshness of rugged roads.
GOOSENECK CONNECTION – CURT
Gooseneck Connect™ 21K
Connect pin box won’t sacrifice truck bed space when combined with a Gooseneck hitch.
RUBBER PIN BOX – MORryde
It moves back-and-forth and side-to-side. This helps to absorb the transfer of energy from the trailer to your truck for a smoother in-cab ride.
Schedule a Pin Box Inspection or Upgrade
If you’re experiencing chucking, rough towing, or want to upgrade your fifth-wheel connection system, our technicians can help determine the right pin box for your RV.
California RV Specialists
200 S. Cherokee Lane
Lodi, CA 95240
209-263-7040
E-mail: service@calrvspecialists.com
Serving RV owners from Lodi, Stockton, Sacramento, Modesto, Elk Grove, Manteca, Tracy, Vacaville, Napa, and communities throughout Northern California.
Make sure you check out our YouTube channel for more helpful information, and other social media pages.
Can’t Bring Your RV to the Shop?
If you’re unable to bring your unit in for installation — or if you’re looking to tackle an upgrade as a DIY project — we’ve got you covered!
Visit our Amazon Store for everything you’ll need, including basic parts, accessories, and tools to help you maintain your RV.