2.5 Emulsion Coilover (x2) & Dual Rate Spring (x4) Package – 12" Travel
The 2.5 Emulsion Coilover & Dual-Rate Spring Package – 12" Travel combines two Radflo 2.5 emulsion coilovers with four Eibach 3.0" ID coilover springs for rock crawlers, trail buggies, Jeeps, and custom off-road chassis that need strong suspension control without the added packaging of remote reservoirs. The larger 2.5" shock body provides increased oil volume and damping capacity, while the 12" travel length keeps shock tower height and chassis clearance manageable for compact suspension layouts.
With two springs per coilover, this package provides a true dual-rate spring stack that can be tuned for ride height, initial compliance, and deeper-travel support. The emulsion shock design keeps the suspension system simple by housing the oil and nitrogen in the main shock body, making this a strong choice for technical crawling, trail use, and recreational off-road builds where packaging simplicity matters more than the added heat capacity of a remote reservoir system.
Includes:
- (2) Radflo 2.5 Emulsion Coilover Shocks – 12" Travel
- (4) Eibach 3.0" ID Coilover Springs – (2) Springs Per Shock
- Dual-Rate Spring Hardware
- Universal Spherical Bearings
- Shock Mounting Hardware
Spring rates are selected when ordering.
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 | Dual-Rate Coilover Shock & Spring Package |
| Shock Part Number | 6CE-003-00 |
| Shock Quantity | (2) |
| Shock Type | Emulsion Coilover |
| Shock Body Diameter | 2.5" |
| Shock Travel | 12" |
| Extended Length | 31.50" |
| Compressed Length | 19.53" |
| Shaft Diameter | 7/8" |
| Reservoir | None – Emulsion Design |
| Spring Series | EIB1400.300.0xxxS |
| Spring Quantity | (4) – Two Springs Per Coilover |
| Spring Configuration | Dual-Rate |
| Spring Free Length | 14" |
| Spring Inside Diameter | 3.0" |
| Spring Rate | Selectable Based on Vehicle & Suspension Setup |
| Dual-Rate Hardware | Included |
| Ride Height Adjustment | Threaded Spring Preload Collar |
| Crossover Adjustment | Adjustable Dual-Rate Crossover |
| 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 Piston | Radflo Aluminum Freeflo Racing Piston |
| Shock Valving | Velocity-Sensitive Deflective Disc |
| Shock Tuning | Consumer or Factory Tunable |
| Shock Fluid | High-Temperature Foam-Resistant Suspension Fluid |
| Pressurization | Nitrogen Charged |
| Shock Serviceability | Fully Rebuildable & Revalvable |
| Spring Material | High-Tensile Chrome Silicon Alloy Spring Steel |
| Spring Manufacturing | Shot Peened & Pre-Set |
| Application | Front or Rear / Universal Custom Suspension |
Fitment
Best Suited For:
- Rock crawlers
- Trail buggies
- Jeep suspension builds
- Custom tube chassis vehicles
- Linked suspension systems
- Technical trail use
- Builds where reservoir packaging is limited
Fitment Notes:
- Universal package for custom front or rear suspension applications
- Verify 31.50" extended and 19.53" compressed mounting lengths before ordering
- Spring rates must be selected around sprung weight, suspension geometry, shock angle, and desired ride height
- Dual-rate spring setup requires proper preload, crossover adjustment, and spring selection
- Cycle the suspension to verify tire, axle, link, chassis, and spring clearance
- Proper bump stop placement is required to prevent the coilover from becoming the suspension travel limiter
- Custom shock tabs or chassis mounts may be required
FAQ
What is the advantage of an emulsion coilover?
An emulsion coilover keeps the shock oil and nitrogen charge inside the main shock body rather than using an external reservoir. This reduces external components and simplifies packaging, making it a good choice for rock crawlers, trail rigs, and custom chassis where sustained high-speed heat is not the primary concern.
Why choose a 2.5" emulsion shock instead of a 2.0" shock?
The larger 2.5" shock body provides greater oil volume and damping capacity than a 2.0" coilover. This gives heavier crawlers, larger-tire vehicles, and more aggressive trail builds additional shock capacity while retaining the simplicity of an emulsion design.
How does an emulsion shock compare with a remote reservoir shock?
Both can provide strong off-road damping performance, but a remote reservoir adds additional fluid and nitrogen capacity outside the shock body and is better suited to applications that generate sustained heat. An emulsion shock is simpler and easier to package, making it well suited to lower-speed crawling and trail applications.
What makes this a dual-rate spring package?
Each coilover uses two springs, giving the package four springs total. The upper and lower springs work with the spring divider and crossover hardware to create a tunable dual-rate spring stack.
Why are 14" springs used with a 12" travel coilover?
Spring free length and shock travel do not have to match. The spring stack is selected around available coilover body length, required preload, spring rates, suspension geometry, and desired ride height. The 14" springs provide the length needed to build the intended dual-rate stack on this 12" travel shock package.
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.
Can ride height and crossover timing be adjusted?
Yes. Spring preload and ride height are adjusted through the threaded collar, while the crossover position controls when the suspension transitions through the dual-rate spring stack.
Are the shocks rebuildable and revalvable?
Yes. The shocks are fully rebuildable and revalvable, allowing them to be serviced or retuned as vehicle weight, suspension geometry, or intended use changes.
