The Radflo 3.0 Coilover with 1″ shaft and remote reservoir is engineered for extreme off-road performance and advanced suspension systems. Built for high speed desert racing, Ultra4 competition, and aggressive trail applications, this 3″ diameter coil-over delivers maximum heat capacity, strength, and tunability.

Choose the ideal spring combination (single or dual-rate), and Radflo will custom valve compression and rebound characteristics to match your vehicle weight, suspension geometry, and performance goals. Once installed, ride height, preload, and travel can be adjusted quickly and precisely without removing the shock from the vehicle.

The integrated coil-over design provides superior performance in a compact package, fitting tight mounting locations where traditional coil spring setups may not. Radflo’s exclusive Freeflo Racing Piston and velocity sensitive valving automatically adapt to terrain conditions, delivering improved control, comfort, and stability.

Includes:

(1) Radflo 3.0 Coilover Shock
Remote Reservoir
Dual Spring Hardware
Universal Spherical Bearing & Mounting Hardware

*Sold Individually

**Springs Sold Separately.

Availability Note: As the #1 Stocking Warehouse for Radflo, we maintain the largest on-shelf inventory of shocks and spring packages in the industry. While we keep the most popular lengths ready for immediate shipment, the high demand for specialized sizes can occasionally result in a lead time on shocks that get ordered.

We are committed to getting your rig on the trail as fast as possible. If your build schedule is critical, please call us to confirm real-time inventory before placing your order.

Shock Type: Coil-Over with Remote Reservoir
Body Diameter: 3.0″
Travel: 10″, 12", 14" or 16"
Shaft Diameter: 1.0″
Bearing Size: 0.75″
Application: Front or Rear
Body Material: SSID Alloy Steel Tube
Body Finish: Clear Cadmium Plating
Body Caps/Eyelets: CNC Machined 6061 Aluminum
Caps Finish: Black Anodized
Rod Material: Nitro Steel
Rod Finish: Mirror Polished
Rod Guide: CNC Machined Bronze with PTFE Coating
Piston: Radflo Aluminum Freeflo Racing Piston
Seal System: Quad-Ring & Lip Seal (Rebuildable)
Valving Type: Velocity-Sensitive Deflective Disc
Valving: Consumer or Factory Tunable
Oil Type: Radflo High-Temp Foam Resistant Suspension Fluid
Pressurization: Nitrogen Gas
Charge Pressure: 200 PSI
Serviceability: Consumer or Factory Serviceable
Springs: Dual Spring Hardware Included (Springs Not Included)
Sold: Individually

Universal fitment for custom high-performance off-road suspension systems including:

Desert race trucks
Ultra4 competition rigs
Long-travel prerunners
Rock race vehicles
Custom tube chassis builds

Proper spring rate selection, mounting dimensions, and reservoir routing must be verified for your application.

The 3.0″ body dramatically increases oil volume and heat capacity compared to smaller coilovers, making it ideal for high speed and endurance applications where thermal control is critical. The remote reservoir further enhances performance by separating nitrogen from oil and reducing fade under sustained abuse.

The 1″ Nitro Steel shaft provides exceptional strength to withstand extreme side loads and harsh race conditions. Radflo’s Freeflo Racing Piston automatically adapts damping response based on shaft velocity, while multi-stage valving allows independent tuning of compression and rebound characteristics.

Fully rebuildable and tunable, this 3.0 coilover is designed for serious racers and builders who demand maximum control and long-term durability.

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