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