The Flex Air is constructed with high-strength steel and a black powder coat finish that protects against rust, giving you the power to tow steadily through all the adventures that lie ahead. Trust the Towing Expertsįor everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®’, and we proudly stand on that! We offer an extensive collection of towing accessories, from gooseneck, 5th wheel and weight distribution hitches to ball mounts, bike racks, pin boxes and much more, to ensure your towing experience is second to none. SPECIALLY DESIGNED - The Flex Air is specifically configured to replace Lippert 1621 5th wheel pin boxes with a towing capacity of 21,000 lbs.Sidewinder is the premium pin box coupler designed specifi cally for short bed pickups.īUILT TO LAST - Constructed with steel and a black powder coat finish that protects against rust, this pin box is extremely durable to ensure peaceful towing day after day.It uses the same bolts as the original pin box, so no additional hardware is needed for installation SIMPLE INSTALLATION - The Flex Air is ready to be installed as soon as it comes out of the box.INNOVATIVE STRUCTURE - This pin box contains an internal air bag that moves in a scissor-like motion to absorb vibrations, a rubberized compound to soften jarring movement, and an oil shock absorber to handle rebound action, dampen kickback and control chucking.IMPROVES RIDE - The Flex Air 5th wheel pin box combines our time-tested Air Ride technology with our Rota-Flex pivoting head to significantly reduce fore to aft movement and vertical tug-of-war between a 5th wheel RV and tow vehicle.When you’re ready to hit the road and set out on your next adventure, trust the towing experts to get you there comfortably! L05 Flex Air® Pin Box - 21,000 lbs. The nimble and quick design automatically eliminates turning and clearance headaches. Now you can make up to 90-degree turns without exiting the truck. Sidewinder’s kingpin locking mechanism moves the pivot position 22” rear of the coupler’s attachment point. This enables Sidewinder to handle up to a 90-degree turn effortlessly. I am not looking to convert to goose neck, so please don't suggest it, just looking at pinbox for the 5th wheel.By moving the pivot rearward while keeping the load centered over the axles, the trailer tracks more closely to the truck.

I still have the original one, which is just the basic pin box, but rather than swap them out, I was wondering what others use for a pin box that helps with the ride and everything. I have it locked in place now and the wedge removed so it acts as a standard pin box. Between that and some rust issues and others, I descided to replace the truck and now have an F-450 so the Sidewinder is no longer needed. Made for terrible handling as the pinbox would shift side to side and cause the truck to track back and forth. While it gave me exceptional backing ability beyond 90*, the wedge did not fit the 5th wheel like it should even though it is the correct one. When I bought my Arctic Wolf, I had added a Reese Sidewinder so I could tow with my short bed. I am curious what others are using for their pin box. (Hey! I noticed I can put a title in now without it jumping to here now! PATCHED! )

Etrailer pinbox measurements