Description
Overview
CURT 2-5/16″ Trailer Ball (40078) is designed for heavy-duty towing applications with Class 5 hitches, providing a secure connection between towing vehicles and trailers requiring 2-5/16″ couplers.
| Model Number | 40078 |
|---|---|
| Weight | 4.12 lb |
| Ball Diameter | 2-5/16″ |
| Shank Diameter | 1-1/4″ |
| Shank Length | 2-5/8″ |
| Towing Capacity | 15,000 lbs gross trailer weight |
| Material | High-strength steel |
| Finish | Chrome |
| Testing Standard | VESC specifications |
Technical Features
- 15,000 lb gross trailer weight rating provides capability for heavy-duty towing applications including large travel trailers, equipment haulers, and boat trailers
- 2-5/16″ ball diameter matches standard heavy-duty trailer couplers for secure mechanical connection
- 1-1/4″ diameter shank with fine threading enhances torque application and holding strength under load
- High-strength steel construction provides structural integrity for maximum rated loads
- Chrome finish delivers corrosion resistance for extended service life in outdoor environments
- VESC specification testing ensures compliance with safety standards for towing applications
- 2-5/8″ shank length provides proper engagement depth with Class 5 hitch receivers
Applications
- Class 5 hitch systems requiring 2-5/16″ ball mounting
- Heavy-duty travel trailers and fifth-wheel applications
- Equipment trailers for construction and landscaping industries
- Large boat trailers and recreational vehicle towing
- Commercial and industrial trailer applications within weight limits






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