SPS Closed Cartridge Rear Shock
Race-tuned. Rider-specific. Professionally built from start to finish.
The SPS Closed Cartridge Rear Shock delivers elite performance using WP’s race-proven closed cartridge technology. Whether you prefer the 4CS or standard version, we handle everything — from sourcing to setup — and deliver a custom-tuned unit ready to ride.
It’s used by top-tier racers in Enduro, Motocross, and even Moto3. You get on-bike adjustability, precise damping, and fade-free performance with no extra hassle.
- Fully adjustable rebound & compression (4CS adjusts while riding)
- Exceptional low-friction response for max terrain feedback
- Built for off-road, street, and adventure use
📊 Technical Data
- System: WP Closed Cartridge (4CS or Standard)
- Damping: Consistent at high compression (up to 8m/s)
- Adjustability: Rebound + compression (tool-free for 4CS)
- Tube Size: 48mm inner tube
- Length: Standard 940/300mm (custom builds available)
- Clamp Size: 60mm / 54mm
- Weight: Under 8kg total
✔ Benefits
- Preloaded oil for constant damping across all terrain
- Minimized maintenance thanks to premium internal coatings
- Wide tuning range for trail, track, or race conditions
- Same tech used in Erzberg, Moto3, Supercross & more
📬 Request a Quote
Every SPS shock is built-to-order based on your riding needs. We handle the entire process and ensure a precision-tuned result, specific to your bike and riding style.
What to Include:
- Make, model & year of your motorcycle
- Your weight (with riding gear)
- Riding type: Motocross, Enduro, Street, etc.
Email us at sales@spsmotorcycles.co.uk and we’ll get back to you with a personalized quote and estimated build time.
★★★★★ “Total game changer. Tracks smoother, jumps land better, feels planted.”
★★★★★ “The 4CS adjusters let me dial it in mid-ride. Worth every cent.”
★★★★★ “SPS made it easy. All I had to do was bolt it on and go.”
🏁 Race Performance Kit
We’re excited to offer a powerful, cost-effective upgrade kit for all WP OEM closed cartridge forks (NOT 4CS). Developed in close collaboration with KTM factory riders, this kit is aimed at ambitious club-level riders looking to close the gap in suspension performance without the cost of a full factory setup.
🔧 Key Benefits
- Retrofits WP Cone Valve compression technology into stock closed cartridge forks
- Significantly improved responsiveness and bottom-out resistance
- Developed and tested by KTM factory racing teams
- Affordable upgrade alternative for competitive riders
📐 Technical Data
- Fits WP OEM Closed Cartridge forks (excluding 4CS)
- Integrates Cone Valve tech into standard units
- Requires installation by an authorized WP Service Centre
- Comes with complete installation manual
Note: Professional installation is required using WP-specific tools. Please contact us to arrange fitting or discuss compatibility with your setup.