---
Fifth-wheel owners know the frustration of trailer chucking—that violent front-to-back motion that shakes your rig and fatigues your frame. Traditional pin boxes transfer every bump directly to your RV, but Curt's Helux design absorbs impacts with its proprietary coil-spring system. This isn't just an upgrade; it's a complete reengineering of how fifth wheels handle road vibrations.
Features
- 24,000-lb. gross weight capacity – Supports even the heaviest fifth-wheel configurations
- Coil-spring suspension – Reduces chucking by 40% compared to rigid pin boxes
- 4,850-lb. max pin weight – Designed for large toy haulers and luxury RVs
- Pivoting head assembly – Minimizes stress points on your RV frame
- Greaseable bushings – Extends service life with easy maintenance
- Universal kingpin – Compatible with most fifth-wheel hitch systems
Unlike basic pin boxes that act as a rigid connection point, the Helux system functions like a suspension component. Its dual-stage coils progressively absorb impacts—small bumps get dampened by the lighter initial spring rate, while larger jolts engage the stiffer secondary coils. This translates to fewer white-knuckle moments when hitting potholes or uneven roads.
The pivoting design is equally critical for long-term durability. By allowing slight rotational movement, the Helux prevents concentrated stress that can crack welds or deform mounting plates. RVers towing through mountain passes or rough terrain will immediately notice the difference in stability and control.
Tech Specs
- Brand: Curt™
- Model: Helux Coil-Spring Pin Box
- Capacity: 24,000 lbs.
- Pin Weight: 4,850 lbs.
- Kingpin Size: Standard 2.5"
- Construction: High-strength steel with powder coating
- Weight: 0 lbs (see packaging for actual)
- SKU: 2024044570
What's Included
- Helux pin box assembly
- Mounting hardware kit
- Installation manual
| Brand | Curt™ |
|---|---|
| Model | Helux Coil-Spring Pin Box |
| Capacity | 24,000 lbs. |
| Pin weight | 4,850 lbs. |
| Kingpin size | Standard 2.5" |
| Construction | High-strength steel with powder coating |
| Weight (lbs) | 0 |
| Sku | 2024044570 |
- Will this pin box fit my lippert frame? Yes—the Helux is designed as a direct replacement for most Lippert pin box configurations. Measure your existing pin box's mounting hole pattern to confirm compatibility.
- How does coil-spring suspension improve towing? The progressive coils absorb road impacts that would normally transfer directly to your RV, reducing trailer chucking and improving driver control.
- What maintenance does this require? Grease the bushings every 6 months or 5,000 miles. Inspect springs and mounting hardware annually.
- Can i install this myself? While mechanically inclined owners can install it, we recommend professional installation due to the critical safety role of pin boxes.
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.