Ramp Door Spring Assembly - Dual Cable Single Spring - M-3 - 96" Tube - 80 lb Door
The CB80S96S is a dual cable, single spring ramp door assembly for enclosed trailer ramp doors. Built around a 96" assembly format and an 80 lb door rating, this M-3 style spring setup helps counterbalance the door for smoother opening and closing.
R&P Knowledge Hub
Compatibility: This assembly is identified as a dual cable, single spring, M-3 style ramp door spring with a 96 inch assembly length for an 80 lb door.
Vehicle / System Fit: Intended for enclosed trailer ramp door applications using a conventional spring-assist layout with dual lift cables and a single main spring.
Installation Notes: Match your existing spring layout, tube length, cable routing, mounting style, and actual hinged door weight before ordering. Torsion spring assemblies store significant energy and should be installed only by an experienced installer.
Performance Insight: A properly matched spring assembly reduces lifting effort, helps protect hinges from excess strain, and improves control during door opening and closing. The most important match points are door weight, assembly length, and spring style.
R&P Service Insight
Ramp door spring systems are commonly replaced when the door becomes harder to lift, loses balance, or shows visible cable and spring fatigue after repeated use.
- Wear: Springs, drums, and cables gradually lose performance through repeated opening and closing cycles
- Exposure: Moisture, dirt, and storage conditions can accelerate corrosion and shorten cable life
- Load Stress: Incorrect spring rating or repeated use on an oversized door can overwork the assembly and strain hinges
Features
- Dual cable, single spring ramp door assembly for enclosed trailer doors
- M-3 style conventional spring format for ramp door assist applications
- 96" assembly length for wide trailer door spring system layouts
- 80 lb door rating to help counterbalance and control door movement
Specifications
| Specification | Detail |
| Part Number | CB80S96S |
| Type | Ramp door spring assembly |
| Configuration | Dual cable, single spring assembly |
| Manufacturer Style | M-3 / M3 style |
| Assembly Length | 96 in. |
| Door Rating | 80 lbs |
| Application | Enclosed trailer ramp door |
| Spring Layout | Single spring |
| Cable Layout | Dual cable |
| Material / Finish | Steel spring assembly |
Fitment / Application
| Category | Details |
| Vehicle / System | Enclosed trailer rear ramp door spring assist system |
| Door Weight Class | 80 lb ramp door applications |
| Assembly Format | 96 in. single-spring, dual-cable configuration |
| Notes | Verify existing spring style, actual door weight, shaft length, cable routing, and mounting layout before installation or replacement. |
Included Components
| Quantity | Item |
| 1 | Dual cable single spring ramp door assembly, M-3 style, 96", rated for 80 lb door |
Verify all specifications, measurements, door weight, and spring-system compatibility before installation. Because torsion spring systems are under load, professional installation is recommended for anyone without prior spring-winding experience.
