These kits are built to order - usually ships in 1-2 weeks.

Please add the following info in your order notes: Rider weight (no gear), riding style, specific year & model and any other info you'd like us to know.

GP install tool kit may be needed for installation.

GP Suspension Harley Bagger Cartridge Kit

End the Bagger Suspension Struggle

Tired of "hideous brake dive" that makes your bike "consistently bottom out on harsh bumps?" Fed up with forks that "always sucked" and leave you "wallowing over medium freeway bumps?" Stock bagger suspension frustrates riders with excessive front end dive during braking, harsh impacts that "knock your teeth together," and the feeling that your "front suspension can't hold you up."

GP Suspension eliminates these problems. Our precision-engineered kit delivers proper spring rates, enhanced damping control, and consistent performance - transforming your bike from wallowing and diving to confident and responsive.

Racetrack Innovation, Street Perfection

Our bagger cartridge kit brings proven racetrack technology to the road—engineered to absorb every bump while delivering exceptional confidence and traction. This isn't an overly stiff race system; it's precision-tuned for optimal street performance, blending race-proven innovation with road-ready comfort.

Manufactured & Built entirely in Ventura, CA. We've never outsourced our machining or engineering—every component is wholly American-made.

What Sets Us Apart

Revolutionary Three-Valve Technology

Our advanced three-valve system delivers superior fluid control and pressure management compared to conventional two-valve designs.

The advantage: The base valve, working alongside rebound and compression valves, provides precise hydraulic flow modulation. This eliminates fluid cavitation and pressure spikes that cause harsh, inconsistent damping in lesser systems.

Real-world performance: Soft response during low-speed compression for comfort, ramping up effectively for heavy impacts like potholes or speed bumps. Your suspension adapts intelligently, maintaining traction by keeping tires consistently connected to the road.

Integrated Topout Spring Control

Integrated Topout Spring Technology eliminates harsh fork extension at full travel while maintaining critical tire-to-ground contact. This prevents the jarring impact typically experienced when forks reach maximum extension and ensures your tire stays planted for maximum traction and control—essential for both safety and performance in all riding conditions.

Progressive Bottom-Out Control

Advanced Bump Stop Technology provides progressive bottom-out control that prevents harsh compression impacts. Rather than a sudden, jarring stop, our system progressively controls compression at the end of travel, maintaining traction and rider confidence even when suspension reaches its limits—critical for aggressive riding and unexpected road obstacles.

Custom-Built for You

Every kit is tailor-made considering your weight, bike weight, and riding preferences. Whether you want buttery smooth cruising on bumpy roads or rail-like precision for aggressive riding, we build your kit specifically for your needs.

Full Adjustability at Your Fingertips

Located conveniently on your new fork cap:

• 12 Turns of Preload Adjustment
• 30 Clicks of Compression Tuning
• 30 Clicks of Rebound Control

Set it and forget it, or fine-tune between rides—we're always a call away for setup support.

Performance & Length Options

• Increased stroke: 117mm to 122mm (optimized through extensive R&D)
• Two length options available:
  • Stock length (recommended for use with GP Suspension 12.8"-13.1" shocks)
  • 2" over (recommended for use with GP Suspension 13.5"-14" shocks for more playful, responsive handling)

Note: Pipe modification or short-style pipe required for shock lengths exceeding 13.1"

Installation Notes

• Upper tube modification required: Larger piston diameter needs additional clearance and OEM bottoming assembly removal
• Optional: Add our pre-modified fork tubes to your order
• 2024 ABS models (2" over): Extended lower lines required (we recommend Magnum 2" over lines for ABS dual disc models)

Experience more traction, more comfort, and most importantly—a ride that puts a smile on your face.

Pricing includes a spring set selected by our setup technician based on your riding information. The toolkit (SKU 008-1) needed to install this fork kit is not included, you will need to purchase it separately if you plan on doing the installation yourself.