The Radflo 2.5 Air Shock with a massive 1-5/8 (1.625) shaft is built for lightweight off-road vehicles that demand strength, simplicity, and tunability and is available in 8, 10", 12", 14", 16", or 18" travel lengths. Designed to reduce suspension weight without sacrificing control, this air shock is a popular choice for rock crawlers, lightweight buggies, and custom tube chassis builds.

Functioning similarly to a coil-over, the air shock supports vehicle weight while controlling suspension movement. Spring rate and ride height are easily adjusted by modifying internal nitrogen pressure and oil volume, eliminating the need for coil spring swaps.

The 2.5 mirror polished SSID alloy steel body increases oil capacity and improves heat management, while the oversized 1.625 piston rod provides exceptional strength under heavy side loads. Its compact design makes installation simple, even in tight chassis configurations.

Includes:

• (1) Radflo 2.5 Air Shock
• Universal Spherical Bearing & Mounting Hardware

*Sold Individually

Availability Note: As the #1 Stocking Warehouse for Radflo, we maintain the largest on-shelf inventory of shocks 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.

Specifications

• Shock Type: Off-Road Air Shock
• Body Diameter: 2.5
• Travel: 8, 10", 12", 14", 16", or 18"
• Shaft Diameter: 1.625 (1 5/8)
• Bearing Size: 0.625
• 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: Steel
• Rod Finish: Mirror Polished & Chrome Plated
• 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: 200 PSI (Adjustable Based on Setup)
• Serviceability: Consumer or Factory Serviceable
• Sold: Individually

Fitment

Universal fitment for custom off-road suspension systems including:

• Rock crawlers
• Lightweight trail rigs
• Ultra4-style builds
• Custom tube chassis vehicles

Proper nitrogen pressure, mounting geometry, and tuning must be set according to vehicle weight and intended use.

Tech Insight

Air shocks combine spring force and damping into one compact, lightweight unit. By adjusting nitrogen pressure, you can quickly fine-tune ride height and spring characteristics without changing hardware.

The large 1.625 shaft significantly increases bending resistance and structural strength, making it ideal for aggressive off-road applications with high side loads. The 2.5 body increases oil volume for improved heat control compared to smaller air shocks.

Radflos Freeflo Racing Piston and velocity sensitive valving automatically adapt damping performance based on terrain, while full rebuildability ensures long term service life and tunability for evolving setups.