2.5 Emulsion Coilover (x2) & Dual Rate Spring (x4) Package – 16" Travel
The 2.5 Emulsion Coilover & Dual-Rate Spring Package – 16" Travel combines two Radflo 2.5 emulsion coilovers with four Eibach 3.0" ID coilover springs for long-travel rock crawlers, rock bouncers, trail buggies, and custom tube chassis vehicles. The larger 2.5" shock body provides increased oil volume and damping capacity, while 16" of travel gives properly designed linked suspension systems substantial articulation and wheel movement without the external reservoir and hose packaging of a remote reservoir setup.
Each coilover uses two 16" springs to create a true dual-rate spring stack that can be tuned for ride height, initial compliance, and increased support deeper into the suspension travel. The emulsion design keeps the shock package simple while retaining rebuildable, tunable damping performance, making this setup especially well suited for long-travel crawling and aggressive trail builds where articulation and suspension simplicity are priorities.
Includes:
- (2) Radflo 2.5 Emulsion Coilover Shocks – 16" Travel
- (4) Eibach 16" x 3.0" ID Coilover Springs – Two Springs Per Shock
- Dual-Rate Spring Hardware
- Universal Spherical Bearings
- Shock Mounting Hardware
Spring rates are selected when ordering from available 100–500 lb/in options.
Availability: Wide Open Design stocks a large selection of Radflo shocks and Eibach springs for immediate shipment. Some spring rates, custom valving configurations, and special-order suspension components may require additional production time.
Need help selecting spring rates or confirming availability? Call us for current inventory and suspension setup assistance.
Specifications
| Specification | Details |
|---|---|
| Package Type | Emulsion Coilover & Dual-Rate Spring Package |
| Shock Part Number | 6CE-005-00 |
| Shock Quantity | (2) |
| Shock Type | Emulsion Coilover |
| Shock Body Diameter | 2.5" |
| Shock Travel | 16" |
| Extended Length | 39.76" |
| Compressed Length | 23.78" |
| Shaft Diameter | 7/8" |
| Reservoir | None – Emulsion Design |
| Shock Valving | Velocity-Sensitive Deflective Disc |
| Shock Tuning | Consumer or Factory Tunable |
| Shock Body Material | SSID Alloy Steel Tube |
| Body Caps / Eyelets | CNC-Machined 6061-T6 Aluminum |
| Cap Finish | Black Anodized |
| Shock Rod Material | Nitro Steel |
| Shock Fluid | High-Temperature Foam-Resistant Suspension Fluid |
| Pressurization | Nitrogen Charged |
| Shock Serviceability | Fully Rebuildable & Revalvable |
| Spring Series | EIB1600.300.0xxxS |
| Spring Quantity | (4) – Two Springs Per Coilover |
| Spring Configuration | Dual Rate |
| Spring Free Length | 16" |
| Spring Inside Diameter | 3.0" |
| Available Spring Rates | 100–500 lb/in |
| Spring Material | High-Tensile Chrome Silicon Alloy Spring Steel |
| Spring Manufacturing | Shot Peened & Pre-Set |
| Ride Height Adjustment | Threaded Spring Preload Collar |
| Crossover Adjustment | Adjustable Dual-Rate Crossover |
| Application | Front or Rear / Universal Custom Suspension |
Fitment
Best Suited For:
- Long-travel rock crawlers
- Rock bouncers
- Trail buggies
- Custom tube chassis vehicles
- Linked front or rear suspension systems
- High-articulation off-road builds
- Applications where reservoir packaging is limited
Fitment Notes:
- Universal package for custom front or rear suspension applications
- Verify 39.76" extended and 23.78" compressed mounting lengths before ordering
- 16" travel requires substantial chassis, axle, tire, link, and driveshaft clearance throughout the complete suspension cycle
- Primary and secondary spring rates should be selected based on sprung weight, suspension geometry, shock angle, ride height, and intended use
- Dual-rate spring setup requires proper preload, crossover adjustment, and spring selection
- Cycle the complete suspension before finalizing shock mounts and spring clearance
- Proper bump stop placement is required to prevent the coilover from becoming the suspension travel limiter
FAQ
Who should use a 16" travel emulsion coilover?
A 16" coilover is intended for custom suspension systems designed around substantial articulation and wheel travel. Long-travel rock crawlers, rock bouncers, and tube chassis buggies are common applications. The chassis and suspension geometry must be designed to properly use the additional travel.
Why choose a 2.5" emulsion coilover?
The 2.5" body provides greater oil volume and damping capacity than a smaller 2.0" coilover while eliminating the external reservoir and hose. This makes it a strong option for aggressive crawling and trail builds that need increased shock capacity but still benefit from simpler packaging.
How does an emulsion shock compare with a remote reservoir shock?
An emulsion shock contains its oil and nitrogen charge inside the main shock body, reducing external components and simplifying installation. A remote reservoir adds additional fluid capacity and heat management, making it better suited to sustained high-speed use and repeated high-energy impacts.
What is the advantage of the dual-rate spring setup?
Each coilover uses two springs, allowing the suspension to be tuned for compliance early in the stroke and increased support deeper into compression. Spring rates, preload, and crossover position all influence how the suspension transitions through its travel.
Why use 16" springs with a 16" travel shock?
The 16" spring length provides the spring stack length needed for this long-travel dual-rate configuration. Final spring selection still depends on required preload, spring rate, suspension geometry, shock angle, and desired ride height.
How do I select the correct spring rates?
Spring rates should be selected using sprung vehicle weight, weight distribution, suspension motion ratio, shock angle, desired ride height, and intended use. Learn how to calculate coilover spring rates here.
Are the shocks rebuildable and revalvable?
Yes. The shocks are fully rebuildable and revalvable, allowing damping characteristics to be serviced or changed as vehicle weight, suspension geometry, or intended use evolves.
