GP Suspension Indian Challenger Cartridge Kit

Racetrack Innovation, Street Perfection

Our Indian Challenger 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.

Revolutionary Three-Valve Technology

What sets us apart: 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.

Advanced Damping Technology

Integrated Topout Spring 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.

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.

Enhanced Performance & Length Options

Two length options available:

• Stock length kit: Includes 1" fork cap extenders - set forks flush in triple clamp for 1" front end height increase
• 2" over kit: Internally lengthened by 1" - set fork caps flush with triple clamp for 2" total ride height increase

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.

What's Included

Pricing includes a spring set selected by our setup technician based on your riding information.