Description
The FOX® 985-24-259 is a 2.0 Performance Series rear smooth-body shock with external reservoir, built for 2014-2026 Ram 3500 trucks running a 4″-6″ rear lift, sold individually.
IMPORTANT: This shock fits Ram 3500 trucks with single rear wheels (SRW) only and does not fit air-suspension-equipped trucks. This is the higher of two rear lift-height options in FOX®’s 2.0 Performance Series lineup for this application — FOX® 985-24-258 covers the same trucks at a 2″-3.5″ rear lift. Confirm your rear lift height, wheel configuration, and suspension type before ordering.
This shock replaces the rear shock on 2014-2026 Ram 3500 trucks with a bolt-on, hassle-free upgrade built around FOX®’s aluminum-bodied Performance Series platform, aimed at drivers who want race-proven damping control without the complexity of a fully adjustable shock.
The shock body is 2.0″ impact-extruded and CNC-machined 6061-T6 clear-anodized aluminum, which dissipates heat faster than a conventional steel-body shock and resists corrosion over time. The external reservoir increases oil and nitrogen capacity, improving heat management and consistency under repeated off-road loading. A billet reservoir clamp is included.
Internally, a race-developed high-flow piston is matched to application-specific valving, delivering predictable, fade-resistant damping over rough terrain. A redundant sealing pack — main seal, wiper seal, and scraper seal — protects the shaft and keeps contaminants out. The black-anodized, CNC-machined 6061-T6 billet aluminum components are backed by FOX®’s Limited Lifetime Warranty.
- Fits 2014-2026 Ram 3500 trucks with single rear wheels (SRW) at a 4″-6″ rear lift; not compatible with air-suspension-equipped trucks
- 2.0″ impact-extruded, CNC-machined 6061-T6 aluminum body with clear-anodized finish for heat dissipation and corrosion resistance
- External reservoir with included billet reservoir clamp increases oil and nitrogen capacity
- Race-developed high-flow piston with application-specific valving
- 5/8″ hard chrome-plated, heat-treated alloy steel shaft
- Redundant sealing pack system: main seal, wiper seal, scraper seal
- Backed by FOX®’s Limited Lifetime Warranty
- Sold individually
| Part Number | 985-24-259 |
| Series | Performance |
| Position | Rear |
| Travel | 11.87″ |
| Rear Lift Height | 4″-6″ |
| Body | 2.0″ impact-extruded 6061-T6 aluminum, clear-anodized |
| Components | Black-anodized, CNC-machined 6061-T6 billet aluminum |
| Shaft | 5/8″ hard chrome-plated, heat-treated alloy steel |
| Piston | Race-developed high-flow piston |
| Valving | Application-specific |
| Seals | Redundant sealing pack: main, wiper, scraper |
| Extended Length | 31.57″ |
| Compressed Length | 19.7″ |
| Top Mount | Eyelet |
| Bottom Mount | Eyelet |
| Wheel/Suspension Compatibility | Single Rear Wheels (SRW) only; not compatible with air suspension |
| What’s Included | (1) Rear shock, billet reservoir clamp, application-specific mounting hardware |
| Warranty | FOX® Limited Lifetime Warranty |
This shock covers 2014-2026 Ram 3500 trucks with single rear wheels at a fixed 4″-6″ rear lift. It does not fit dual rear wheel (DRW) or air-suspension-equipped trucks. FOX® also builds part number 985-24-258 for this same application at a 2″-3.5″ rear lift — confirm your rear lift height, wheel configuration, and suspension type before ordering, as these are not interchangeable.