Radflo 2.5 DRT Internal Bypass Coilover Shock – Remote Reservoir & Adjuster
6CV-001-9A
The Radflo 2.5 DRT Internal Bypass Coilover Shock combines position-sensitive internal bypass technology, remote reservoir performance, and compression adjustability in one compact suspension package. Radflo's Dynamic Ride Technology (DRT) uses both velocity-sensitive and position-sensitive damping to keep the suspension compliant over small rocks, roots, chatter, and trail obstacles while progressively increasing control deeper into the shock travel.
Unlike a conventional coilover that routes shock fluid through the piston throughout the entire stroke, Radflo DRT technology uses internal bypass circuits to control fluid flow based on piston position. This creates defined damping zones within the shock travel for improved small-bump compliance, traction, ride quality, and control during larger impacts.
Built for rock crawlers, Ultra4 cars, prerunners, Jeeps, trucks, UTVs, and custom off-road vehicles, the 2.5 DRT gives builders many of the advantages of a bypass shock without the external bypass tubes and additional packaging requirements.
Includes:
- (1) Radflo 2.5 DRT Internal Bypass Coilover Shock
- Remote Reservoir
- Universal Spherical Bearings & Mounting Hardware
- JIC/ORB Reusable Hose Fittings
Important Notes:
- Springs sold separately
- Sold individually
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Radflo Suspension Technology |
| Series | DRT Internal Bypass |
| Shock Type | Coilover with Remote Reservoir |
| Body Diameter | 2.5" |
| Shaft Diameter | 7/8" |
| Travel Options | 8", 10", 12", 14", 16", 18" |
| Adjustability | Compression Adjusters |
| Internal Bypass | Radflo Dynamic Ride Technology (DRT) |
| Valving | Velocity-Sensitive Deflective Disc |
| Reservoir | Remote Reservoir |
| Piston | 2.0" 6061-T6 Billet Aluminum RST HiFlo Race Piston |
| Piston Finish | Type II Hard Anodized |
| Body Material | SSID Alloy Steel |
| Body Finish | Zinc Plated with Clear Coat |
| Rod Material | Stainless Steel or Hardened Steel |
| Rod Finish | Mirror-Polished Chrome Plated |
| Rod Guide | Machined Bronze with PTFE Coating |
| Seal System | 3-Stage Redundant Seal Cap with Mechanical Scraper |
| Bearings | FK Heat-Treated Steel Spherical Bearings, PTFE Lined |
| Body Caps | CNC-Machined 6061 Aluminum, Black Anodized |
| Shock Oil | Radflo High-Temperature Foam-Resistant Suspension Fluid |
| Pressurization | Nitrogen Gas |
| Tuning | Consumer or Factory Tunable |
| Serviceability | Consumer or Factory Serviceable |
| Country of Origin | USA |
Fitment
Universal coilover shock for custom suspension applications including:
- Rock crawlers and trail buggies
- Ultra4 and off-road race vehicles
- Desert race trucks and prerunners
- Jeep suspension builds
- Off-road trucks and SUVs
- UTVs and side-by-sides
- Custom tube chassis vehicles
Fitment Notes:
- Select shock travel based on available suspension travel and mounting geometry.
- Coil springs are sold separately and must be selected for vehicle weight, suspension geometry, and intended use.
- Verify compressed length, extended length, mounting dimensions, reservoir placement, and chassis clearance before ordering.
FAQ
How does an internal bypass shock differ from a standard coilover?
A standard coilover generates damping primarily through the piston and shim stack. An internal bypass shock adds fluid circuits that alter damping based on piston position. This allows the shock to remain more compliant through certain portions of its travel while increasing control as the suspension moves into higher-load zones.
What is the difference between an internal bypass and external bypass shock?
External bypass shocks use external tubes to route shock fluid around the piston at different points in the travel. Internal bypass shocks create position-sensitive damping zones inside the shock body, providing many of the same performance principles in a more compact package.
Internal bypass advantages include:
- Compact packaging
- Fewer external components
- Cleaner installation
- Improved ride quality and suspension control
External bypass advantages include:
- Greater external tuning capability
- More control over individual damping zones
- Highly configurable for dedicated race applications
Will an internal bypass shock ride better than a standard coilover?
Internal bypass technology can improve small-bump compliance, tire contact, ride comfort, and suspension control by allowing damping characteristics to change throughout the shock travel. Final ride quality still depends on proper spring rates, shock valving, mounting geometry, vehicle weight, and suspension setup.
What does position-sensitive damping mean?
Position-sensitive damping means the shock's damping characteristics change depending on where the piston is within the shock travel. Radflo DRT uses internal bypass circuits to create different damping characteristics through different portions of the stroke.
What does velocity-sensitive damping mean?
Velocity-sensitive damping responds to how quickly the shock shaft is moving. As shaft velocity increases during harder or faster impacts, the shock generates additional damping force to help control suspension movement.
