Need help with installation?
Find a nearby mobile RV technician for measurement, install, or finish work. Search by ZIP or city and click through to full RVService.PRO technician profiles.
---
The most comfortable towing experience. The Flex Air® Pin Box combines Lippert's time-tested Trailair® Air Ride™ technology with its Rota-Flex® pivoting head to significantly reduce fore-to-aft movement and vertical tug-of-war between a fifth-wheel RV and tow vehicle, providing the user a more comfortable ride. The Flex Air® Pin Box utilizes an air bag to absorb road shock and vibrations, a rubberized compound to soften jarring motion, and an oil shock absorber to handle rebound action, dampen kickback and control chucking.
- 21,000lbs tow capacity
- Pivoting head
- Air Ride™ Technology
- Rubberized compound
- Oil shock
- Only compatible with Rhino™ Box pin box designs
| Materials | Rubberized compound, oil shock absorber, air bag |
|---|---|
| Width (inches) | 22 |
| Height (inches) | 21 |
| Length (inches) | 44 |
| Weight (pounds) | 205 |
| Tow capacity (pounds) | 21000 |
| Dimensional weight (pounds) | 122.46 |
| Suspension type | Flex Air (Air Bag + Oil Shock) |
| King pin compatibility | Rhino Box |
| Material | Rubberized compound |
| W capacity (lbs) | 21000 |
| Length (in) | 44 |
| Width (in) | 22 |
| Height (in) | 21 |
| Part number | 807711 |
| Best for | Comfortable towing with reduced movement |
- What is the towing capacity of the curt flex air pin box? The Curt Flex Air Pin Box has a towing capacity of 21,000 lbs.
- What technology does the flex air pin box use to improve ride comfort? The Flex Air Pin Box combines Trailair Air Ride technology with a Rota-Flex pivoting head to reduce fore-to-aft movement and provide a more comfortable towing experience.
- Is the curt flex air pin box compatible with all pin box designs? No, the Curt Flex Air Pin Box is only compatible with Rhino Box pin box designs.
- How does the flex air pin box reduce road shock and vibrations? It uses an air bag to absorb road shock and vibrations, a rubberized compound to soften jarring motion, and an oil shock absorber to handle rebound action and control chucking.
- What is the size of the curt flex air pin box? The pin box measures 44 inches in length, 22 inches in width, and 21 inches in height.
Need help with installation?
Find a nearby mobile RV technician for measurement, install, or finish work. Search by ZIP or city and click through to full RVService.PRO technician profiles.
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.