Radflo 2.5 Emulsion + Eibach Spring Package • 12" Travel • 2 Shocks + 4 Springs.
The Radflo 2.5 Emulsion + Eibach Spring Package combines two 12" travel Radflo emulsion coilover shocks with four 12" Eibach coilover springs for a complete dual-rate off-road suspension setup. Featuring 2.5" shock bodies and heavy-duty 7/8" Nitro Steel shafts, these coilovers provide increased oil volume and damping capacity over smaller 2.0" shocks while maintaining a reservoir-free design for demanding trail use and rock crawling.
Each Radflo coilover features a Freeflo Racing Piston, velocity-sensitive valving, and adjustable dual-rate spring hardware for suspension tuning. The package includes two primary and two secondary Eibach 12" x 3.0" ID coilover springs, allowing separate spring rates to be selected for each position. Adjustable spring preload and crossover hardware allow builders to tune ride height and the dual-rate spring transition, while the fully rebuildable and revalvable shocks provide long-term serviceability.
Includes:
- (2) Radflo 2.5 Emulsion Coilover Shocks – 12" Travel
- (2) Eibach Primary Coilover Springs – 12" Length x 3.0" ID
- (2) Eibach Secondary Coilover Springs – 12" Length x 3.0" ID
- Dual-Rate Spring Hardware Included with Radflo Shocks
- Universal Spherical Bearings & Mounting Hardware
Spring Rate Selection: Select your desired primary and secondary Eibach spring rates from the available options. Both primary springs will be supplied in the selected primary rate, and both secondary springs will be supplied in the selected secondary rate.
Shipping & Assembly: This package ships with the Radflo shocks and Eibach springs packaged separately. Springs are not installed on the shocks. Assembly and suspension setup are required.
Availability: Wide Open Design stocks a selection of Radflo shocks and Eibach springs. Some spring rates, custom valving configurations, and special-order components may require additional production time.
Need help selecting spring rates or confirming availability? Call Wide Open Design for suspension setup assistance.
Specifications
Package Specifications
| Package Type | Radflo Dual-Rate Emulsion Coilover Shock & Eibach Spring Package |
|---|---|
| Shock Manufacturer | Radflo Suspension Technology |
| Spring Manufacturer | Eibach |
| Shock Quantity | (2) Coilover Shocks |
| Spring Quantity | (4) Coilover Springs |
| Spring Configuration | Dual-Rate / Two Springs Per Shock |
| Spring Rate Selection | Customer Selected Primary & Secondary Rates |
| Spring Rate Matching | Both Primary Springs Match; Both Secondary Springs Match |
| Spring Hardware | Dual-Rate Hardware Included |
| Assembly | Shocks & Springs Shipped Unassembled |
| Primary Application | Custom Off-Road Dual-Rate Coilover Suspension |
Radflo 2.5 Emulsion Coilover Specifications
| Manufacturer | Radflo Suspension Technology |
|---|---|
| Part Number | 6CE-003-00 |
| Shock Type | Emulsion Coilover |
| Shock Body Diameter | 2.5" |
| Shock Travel | 12" |
| Extended Length | 31.50" |
| Compressed Length | 19.53" |
| Shaft Diameter | 7/8" (0.875") |
| Shaft Material | Nitro Steel |
| Reservoir Type | None – Emulsion Design |
| Oil & Gas Configuration | Oil and Nitrogen Charge Contained Within Shock Body |
| Body Material | SSID Alloy Steel Tube |
| Body Caps / Eyelets | CNC-Machined 6061-T6 Aluminum |
| Body Cap Finish | Black Anodized |
| Coilover Hardware | Adjustable Spring Preload, Spring Slider & Dual-Rate Crossover Hardware |
| Piston | Radflo Aluminum Freeflo Racing Piston |
| Valving Type | Velocity-Sensitive Deflective Disc |
| Valving Tuning | Consumer or Factory Tunable |
| Suspension Fluid | High-Temperature Foam-Resistant Suspension Fluid |
| Pressurization | Nitrogen Gas |
| Mounting | Universal Spherical Bearings & Hardware |
| Serviceability | Fully Rebuildable & Revalvable |
Shock Dimensions: Published extended and compressed measurements are nominal reference dimensions. Verify mounting dimensions and available suspension clearance before installation.
Eibach Coilover Spring Specifications
| Manufacturer | Eibach |
|---|---|
| Spring Series | 1200.300 |
| Spring Type | Linear-Rate Coilover Springs |
| Spring Configuration | Dual-Rate / Primary & Secondary Springs |
| Spring Inside Diameter | 3.0" |
| Primary Spring Length | 12" |
| Secondary Spring Length | 12" |
| Primary Spring Quantity | (2) |
| Secondary Spring Quantity | (2) |
| Available Spring Rates | 100–400 lb/in |
| Available Rate Options | 11 |
| Primary Spring Rate | Customer Selected |
| Secondary Spring Rate | Customer Selected |
| Spring Rate Matching | Both Primary Springs Match; Both Secondary Springs Match |
| Spring Material | High-Tensile Chrome Silicon Alloy Spring Steel |
| Manufacturing | Shot Peened & Pre-Set |
Available Eibach Spring Rates
| Spring Rate | Eibach Part Number |
|---|---|
| 100 lb/in | 1200.300.0100S |
| 125 lb/in | 1200.300.0125S |
| 150 lb/in | 1200.300.0150S |
| 175 lb/in | 1200.300.0175S |
| 200 lb/in | 1200.300.0200S |
| 225 lb/in | 1200.300.0225S |
| 250 lb/in | 1200.300.0250S |
| 300 lb/in | 1200.300.0300S |
| 325 lb/in | 1200.300.0325S |
| 350 lb/in | 1200.300.0350S |
| 400 lb/in | 1200.300.0400S |
Spring Selection Note: Each shock uses one primary and one secondary 12" Eibach spring. Primary and secondary spring rates may differ, but both shocks receive matching spring combinations.
Fitment
Universal Fitment for Custom Off-Road Suspension Systems
This package is intended for custom front or rear coilover suspension applications requiring 12" travel Radflo 2.5 emulsion shocks and a dual-rate Eibach spring configuration.
Common Applications:
- Rock Crawlers & Trail Buggies
- Custom Tube-Chassis Buggies
- Jeep Suspension Builds
- Recreational Off-Road Trucks
- Linked Front & Rear Suspension Systems
- Custom Long-Travel Suspension Builds
Fitment & Installation Notes:
- Universal coilover package requiring custom suspension mounting and setup.
- Includes two 12" travel shocks and four 12" long, 3.0" ID Eibach springs.
- Each shock uses one primary spring and one secondary spring.
- Both primary springs match the selected primary rate; both secondary springs match the selected secondary rate.
- Verify 31.50" extended length, 19.53" compressed length, mounting dimensions, and chassis clearance before ordering.
- Spring rates must be selected for vehicle weight, shock angle, suspension motion ratio, and intended ride height.
- Confirm available preload adjustment, spring slider travel, and crossover positioning.
- Cycle the suspension to verify chassis, tire, axle, driveshaft, and suspension link clearance.
- Proper bump stop placement is required to prevent shocks from becoming the suspension's compression limit.
- Custom shock tabs, mounting brackets, and chassis fabrication may be required.
- Shocks and springs ship unassembled and require installation and suspension setup.
FAQ
What is included in this Radflo and Eibach dual-rate coilover package?
The package includes two Radflo 2.5 emulsion coilover shocks with 12" travel, four Eibach 12" x 3.0" ID coilover springs, dual-rate spring hardware, spherical bearings, and mounting hardware.
How do I select my primary and secondary Eibach spring rates?
Select your desired primary and secondary spring rates from the available options. Both primary springs will be supplied in the selected primary rate, and both secondary springs will be supplied in the selected secondary rate. Available spring rates range from 100 to 400 lb/in.
What is the difference between a two-spring and four-spring package?
The two-spring package includes one spring per shock for a single-spring configuration. This four-spring package includes two springs per shock, allowing a complete dual-rate spring setup with independently selected primary and secondary rates.
How does a dual-rate coilover suspension work?
A dual-rate coilover uses two springs separated by a spring slider. During initial suspension compression, both springs work together to provide a softer combined rate. Adjustable crossover stops can then transition the suspension to the lower spring's rate deeper in the stroke.
Do the shocks and springs arrive assembled?
No. The Radflo shocks and Eibach springs are packaged separately. Springs are not installed on the shocks, and assembly and suspension setup are required.
What is the advantage of an emulsion coilover?
An emulsion coilover contains its oil and nitrogen charge within the shock body, eliminating the external reservoir and hose. This simplifies packaging for custom off-road suspension systems.
How do I know if 12" travel is correct for my suspension?
Shock travel must match the suspension's measured compression and droop requirements. The Radflo 12" emulsion coilover has a published extended length of 31.50" and compressed length of 19.53". Verify mounting geometry and available clearance before ordering.
Can ride height and dual-rate crossover be adjusted?
Yes. The Radflo coilovers include adjustable spring preload and dual-rate crossover hardware, allowing builders to tune ride height and the spring rate transition within the limits of the suspension design.
Can the Radflo emulsion shocks be rebuilt or revalved?
Yes. Radflo 2.5 emulsion coilovers are fully rebuildable and revalvable. Internal valving can be tuned to match vehicle weight, spring configuration, suspension geometry, and intended driving conditions.
How do I calculate the correct coilover spring rates?
Spring selection depends on sprung vehicle weight, shock angle, suspension motion ratio, and desired ride height. Watch our spring rate calculation guide for help understanding coilover spring selection.
