Radflo 2.5 Bypass Shock w/ Remote Reservoir – 4 Tube - 7/8″ Shaft
SKU: 6BP-404-0R
The Radflo 2.5 4-Tube Bypass Shock is built for elite level off-road performance where maximum damping control is required. Featuring a 7/8″ Nitro Steel shaft and four external bypass tubes, this shock delivers extreme adjustability for desert racing, Ultra4 competition, and aggressive high speed applications.
External bypass technology allows precise tuning of compression and rebound zones throughout the entire stroke. With four tubes, you gain expanded adjustability, enabling independent control of initial travel comfort, mid-stroke stability, and aggressive bottom out resistance. The 2.5″ smooth body paired with a remote reservoir increases oil capacity and thermal stability, reducing fade and maintaining consistent performance under extreme heat.
Includes:
- (1) Radflo 2.5 4-Tube Bypass Shock
- Remote Reservoir
- Universal Spherical Bearing & Mounting Hardware
*Sold Individually.
Specifications
- Shock Type: External Bypass with Remote Reservoir
- Body Diameter: 2.5″
- Travel Length: 14″ or 16"
- Shaft Diameter: 0.875″ (7/8″)
- Bearing Size: 0.625″
- Application: Front or Rear
- Bypass Tubes: 4
- 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: Combination 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: Starting at 200 PSI (Based on Location)
- Serviceability: Consumer or Factory Serviceable
- Sold: Individually
Fitment
Universal fitment for high-performance off-road suspension systems including:
- Desert race trucks
- Ultra4 competition builds
- Long-travel prerunners
- Rock race vehicles
- Custom tube chassis applications
Proper mounting dimensions, valving setup, and bypass tube orientation must be confirmed for your specific vehicle.
Tech Insight
A 4-tube bypass configuration provides increased damping control compared to 2- or 3-tube setups. This allows racers and builders to precisely shape the shock curve across the entire stroke with soft initial response for small chatter, firm mid-stroke control for stability, and aggressive bottom out control for big hits.
The 2.5″ body increases oil volume for improved heat dissipation, while the remote reservoir further stabilizes performance under extended racing conditions. The 7/8″ Nitro Steel shaft provides excellent strength-to-weight balance, maintaining responsiveness without unnecessary mass.
Fully rebuildable and tunable, the Radflo 4-Tube Bypass Shock is designed for those who demand complete control over their suspension performance.