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Tired of white-knuckle drives with your 5th wheel? Standard pin boxes transmit every bump and sway directly to your truck, forcing constant steering corrections. The Curt Helux coil-spring pin box solves this with its dual-spring suspension system that absorbs road shocks and reduces trailer oscillation by up to 40% compared to rigid designs.
Features
- 18,000 lbs. capacity - Handles heavy 5th wheel trailers with confidence
- 3,500 lbs. pin weight rating - Engineered for large RV loads
- Dual coil-spring suspension - Reduces trailer sway by cushioning lateral forces
- Greaseable pivot points - For long-term smooth operation
- 3/4" kingpin - Standard size fits most 5th wheel hitches
- Precision laser-cut components - For consistent fit and durability
The Helux pin box isn't just about comfort - it's a safety upgrade. By dampening sudden movements, it gives you more time to react to crosswinds or emergency maneuvers. The spring design also reduces wear on your truck's suspension components by preventing harsh impacts from potholes or uneven roads.
Curt engineered this pin box for full-time RVers and heavy haulers. The all-steel construction undergoes rigorous fatigue testing, with each unit inspected before shipping. Unlike cheaper alternatives, the Helux maintains consistent performance through years of use without sagging or developing slop in the pivot points.
Tech Specs
- Capacity: 18,000 lbs.
- Pin Weight: 3,500 lbs.
- Kingpin Size: 3/4"
- Construction: Laser-cut steel
- Finish: Powder-coated black
- Weight: 0 lbs (contact for exact shipping weight)
What's Included
- Curt Helux coil-spring pin box assembly
- Installation hardware
- Grease fittings pre-installed
| Capacity | 18,000 lbs. |
|---|---|
| Pin weight | 3,500 lbs. |
| Kingpin size | 3/4" |
| Construction | Laser-cut steel |
| Finish | Powder-coated black |
| Weight (lbs) | 0 |
| Sku | 2024044569 |
- Will this fit my 2018 grand design reflection? Yes, this pin box is compatible with most 5th wheel trailers using standard 3/4" kingpins. Measure your existing pin box mounting pattern to confirm bolt alignment.
- How does the coil spring compare to air ride systems? Coil springs provide consistent performance without needing compressors or maintenance. While not as adjustable as air systems, they're more reliable for long-term use.
- Is professional installation required? While mechanically-inclined owners can install it, we recommend professional installation to ensure proper torque specs and alignment.
- What's the warranty coverage? Curt backs this pin box with a 1-year limited warranty against manufacturing defects.
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.