2.5 Remote Reservoir Coilover (x2) & Dual Rate Spring (x4) Package – 12" Travel
The 2.5 Remote Reservoir Coilover & Dual-Rate Spring Package – 12" Travel combines two Radflo 2.5 remote reservoir coilovers with four Eibach 3.0" ID coilover springs to create a true dual-rate suspension package for rock crawlers, trail buggies, Jeeps, and custom tube chassis vehicles. The larger 2.5" shock body provides increased oil volume and damping capacity over a 2.0" coilover, while the 12" travel length keeps packaging manageable for builds that need strong suspension control without stepping into a longer-travel shock.
With two springs per coilover, this setup allows the suspension to use a dual-rate spring stack for improved compliance early in the travel and additional support deeper into the suspension cycle. The remote reservoirs add fluid capacity and help manage heat during repeated impacts and extended off-road use, while spring rates and crossover settings can be tuned around vehicle weight, suspension geometry, ride height, and intended terrain.
Includes:
- (2) Radflo 2.5 Remote Reservoir 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 shock configurations, spring rates, custom valving packages, and special-order 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 | 6CR-003-00 |
| Shock Quantity | (2) |
| Shock Type | Remote Reservoir Coilover |
| Shock Body Diameter | 2.5" |
| Shock Travel | 12" |
| Extended Length | 31.50" |
| Compressed Length | 19.53" |
| Shaft Diameter | 7/8" |
| Reservoir Type | Remote Reservoir |
| Spring Series | EIB1200.300.0xxxS |
| Spring Quantity | (4) – Two Springs Per Coilover |
| Spring Configuration | Dual-Rate |
| Spring Length | 12" |
| 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 |
| Shock Body Finish | Clear Cadmium Plating |
| 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 Oil | High-Temperature Foam-Resistant Suspension Fluid |
| Shock Pressurization | Nitrogen Gas |
| 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
- Heavier recreational off-road builds
- Applications needing more damping capacity without longer shock travel
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 intended 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
- Remote reservoir routing must remain clear of tires, exhaust, links, and other moving components
- Proper bump stop placement is required to prevent the coilover from becoming the suspension travel limiter
FAQ
What makes this a dual-rate coilover package?
Each shock uses two coil 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 choose a 2.5" shock body with 12" of travel?
The 2.5" body provides more oil volume and damping capacity than a 2.0" coilover, while the 12" travel length keeps the shock easier to package than longer 14", 16", or 18" configurations. This combination works well for heavier crawlers and trail rigs that need more shock capacity without building around extreme suspension travel.
What is the advantage of a dual-rate spring setup?
A dual-rate spring stack allows the suspension to use two springs per shock and tune how the suspension behaves through different portions of its travel. Proper spring selection and crossover adjustment can provide compliance early in the stroke while adding support as the suspension moves deeper into travel.
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. Ride height and preload are adjusted through the threaded spring collar, while the crossover position controls when the spring stack transitions during compression. Both settings should be tuned together as part of the complete suspension setup.
What does the remote reservoir add to the package?
The remote reservoir increases fluid and nitrogen capacity outside the main shock body, helping manage heat and maintain more consistent damping during repeated suspension cycling and extended off-road use.
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.
