PROGRESSIVE SUSPENSION Monotube Fork Cartridge Kit - Standard 31-2500

If your dual damper rod forks are limiting your front-end performance, this PROGRESSIVE SUSPENSION Monotube Fork Cartridge Kit delivers the precision handling and brake control that serious riders demand. The gas-charged mono-tube design resists front brake dive, improves cornering stability, and prevents bottoming—all without requiring fork modification. This is a straightforward bolt-on upgrade that transforms your suspension into a high-performance system tuned for real-world riding.

The kit includes a pair of custom-tuned fork springs matched to the mono-tube cartridges, ensuring balanced damping and support across the full range of suspension travel. Whether you're pushing hard on the track or refining your everyday ride, this cartridge system gives you the responsive, predictable handling that separates quality suspension from the rest.

• Converts dual damper rod forks
• Gas-charged mono-tube design
• High-performance fork springs included
• Bolt-on installation
• No fork modification required
• Reduces front brake dive
• Improves cornering stability
• Enhances bottoming resistance
• Lowers front up to 2"
• Made in the U.S.A.
• MPN: 31-2500
• Not compatible with LOW models