2.5 Remote Reservoir Coilover (x2) & Dual-Rate Spring (x4) Package – 16" Travel
The 2.5 Remote Reservoir Coilover & Dual-Rate Spring Package – 16" Travel combines two Radflo 2.5 remote reservoir 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 shock travel gives properly designed linked suspensions substantial room for articulation and wheel movement.
Each coilover uses a two-spring dual-rate stack, allowing the suspension to combine a compliant initial rate with increased support deeper into compression. Remote reservoirs add fluid capacity and improve heat management during repeated impacts and extended suspension cycling, making this package a strong choice for larger, heavier, or more aggressively driven off-road builds where long travel, spring-rate tuning, and consistent shock performance all matter.
Includes:
- (2) Radflo 2.5 Remote Reservoir Coilover Shocks – 16" Travel
- (4) Eibach 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.
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 | Remote Reservoir Coilover & Dual-Rate Spring Package |
| Shock Part Number | 6CR-005-00 |
| Shock Quantity | (2) |
| Shock Type | Remote Reservoir Coilover |
| Shock Body Diameter | 2.5" |
| Shock Travel | 16" |
| Extended Length | 39.76" |
| Compressed Length | 23.78" |
| Shaft Diameter | 7/8" |
| Reservoir Type | Remote Reservoir |
| 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 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 | EIB1400.300.0xxxS |
| Spring Quantity | (4) – Two Springs Per Coilover |
| Spring Configuration | Dual Rate |
| Spring Free Length | 14" |
| Spring Inside Diameter | 3.0" |
| Spring Rates | Selectable Based on Vehicle & Suspension Setup |
| Spring Material | High-Tensile Chrome Silicon Alloy Spring Steel |
| Spring Manufacturing | Shot Peened & Pre-Set |
| Ride Height Adjustment | Threaded Spring Preload Collar |
| Application | Front or Rear / Universal Custom Suspension |
Fitment
Best Suited For:
- Long-travel rock crawlers
- Rock bouncers
- Trail buggies
- Custom tube chassis vehicles
- Linked suspension systems
- Large-articulation off-road builds
- Heavier or aggressively driven off-road vehicles
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 adequate chassis, axle, tire, driveshaft, and suspension clearance throughout the complete suspension cycle
- Primary and secondary spring rates should be selected around sprung weight, suspension geometry, shock angle, and intended use
- Cycle the complete suspension before finalizing shock mounts and spring clearance
- Remote reservoir routing must remain clear of tires, exhaust, suspension links, and other moving components
- Proper bump stop placement is required to prevent the coilover from becoming the suspension travel limiter
FAQ
What is the advantage of a dual-rate spring setup?
A dual-rate setup uses two springs on each coilover to give builders greater control over how the suspension behaves through its travel. Proper spring selection and crossover adjustment can provide compliance and traction early in the stroke while adding support as the suspension moves deeper into compression.
Who should use a 16" travel coilover package?
A 16" coilover is best suited for custom suspension systems specifically designed around substantial wheel travel and articulation. Rock bouncers, long-travel crawlers, and larger tube chassis buggies are common applications. More shock travel is only beneficial when the chassis and suspension geometry are designed to use it correctly.
Why choose a 2.5" coilover instead of a 2.0" coilover?
The larger 2.5" body provides increased oil volume and damping capacity. That additional capacity becomes increasingly useful as vehicle weight, tire size, suspension travel, speed, and repeated shock cycling increase.
Why use a remote reservoir?
The remote reservoir increases fluid and nitrogen capacity outside the main shock body, helping manage heat and maintain more consistent damping during repeated impacts and extended suspension cycling.
How do I select the correct dual-rate springs?
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.
