Radflo 2.5 Hydraulic Bump Stop - 1-5/8” Shaft
6SB-001-00
The Radflo Off-Road 2.5 Hydraulic Bump Stop is engineered to control hard suspension. Using velocity sensitive damping, it acts as a secondary shock during the final inches of compression; this hydraulic bump stop progressively increases damping resistance to absorb impact energy while protecting both the vehicle and occupants from damaging stress loads.
At the core is Radflo’s exclusive Freeflo® Racing Piston, combined with a massive 1.25" chrome plated alloy steel shaft, machined bronze rod guide, and multi-direction sealing system, this bump stop is built to survive the harshest off-road environments. Stroke options of 2", 3", or 4" allow proper integration into a wide range of suspension designs and mounting constraints. Every unit is fully rebuildable, serviceable, and tunable, ensuring long term performance and virtually unlimited service life.
Includes:
- Radflo 2.5 Hydraulic Bump Stop (Pin Mount)
- Universal spherical bearing and mounting hardware
- Sold individually
Specifications
- Product Type: Off-Road Hydraulic Bump Stop (Pin Mount)
- Body Diameter: 2.5
- Travel Length: 2", 3" or 4"
- Rod Shaft Diameter: 1.625
- Rod Material: Mirror-Polished Alloy Steel
- Rod Finish: Chrome Plated
- Body Material: SSID Alloy Steel Tube
- Body Finish: Clear Cadmium Plating
- Body Caps / Eyelets: CNC-Machined 6061 Aluminum
- Body Caps Finish: Black Anodized
- Rod Guide: CNC-Machined Bronze with PTFE Coating
- Piston: Radflo Aluminum Freeflo® Racing Piston
- Seals: Quad-Ring and Lip Seal Combination (Rebuildable)
- Valving Type: Velocity-Sensitive Deflective Disc
- Valving Adjustment: Self-Adjusting
- Valving Tuning: Consumer or Factory Tunable
- Oil: Radflo High-Temp Foam-Resistant Suspension Fluid
- Pressurization: Nitrogen Gas
- Nitrogen Pressure: 200 PSI
- Serviceability: Consumer or Factory Serviceable
Fitment
- Universal Fitment
- Designed for custom off-road suspension systems
- Ideal for rock crawlers, Ultra4, desert trucks, buggies, prerunners, and heavy trail rigs
- Proper mounting height and engagement should be matched to total suspension travel
Tech Insight
Hydraulic bump stops act as controlled energy absorbers rather than hard stops. By using velocity-sensitive damping, the Radflo 2.5 bump stop progressively slows suspension movement during the final portion of compression—reducing peak loads on shocks, mounts, chassis components, and the driver.
The larger 2.5 body and 1-5/8" shaft provide increased oil volume, strength, and thermal capacity, making this bump stop ideal for heavier vehicles and higher-impact applications.
