Sirris R38 Shock: E Ride Pro SS 3.0
- Lead Time: Ships in 5 days
The Sirris R38 Rear Shock upgrade brings true motocross-inspired suspension technology to the E Ride Pro SS 3.0. Based on the proven Sirris R46 platform, the R38 features oversized internal architecture, massive oil flow, and an advanced 2-Stage Compression (2SC) damping system for exceptional control, consistency, and durability on aggressive trails, jumps, and high-speed terrain.
Unlike typical mountain bike-based e-moto shocks, the R38 Shock is engineered specifically for the demands of lightweight electric dirt bikes. Independent high-speed and low-speed compression adjustment, rebound adjustment, and spring preload allow riders to fine-tune suspension performance for any riding style or terrain.
Features
- Designed specifically for the E Ride Pro SS 3.0
- Moto-inspired R46 internal architecture in a compact chassis
- Independent high-speed and low-speed compression adjustment (2SC)
- Tool-free rebound adjustment and spring preload adjustment
- High-flow 38mm piston for consistent damping and reduced fade
- Large 16mm hollow hard-chromed shaft for maximum strength
- Type III hard anodized aluminum body with ACME threads
- CMX (Compact Motocross Tune) optimized for aggressive off-road riding
- Pairs perfectly with the Sirris F43 CMX Fork: E Ride Pro SS 3.0
Important: The original factory E Ride Pro SS 3.0 linkage is not compatible with the Sirris R38 Shock. The R38 requires the Prickly Sirris R38 Linkage Kit. The Prickly Linkage raises the rear of the bike approximately 25mm to properly accommodate the larger R38 shock.
Specifications
- Length: 289mm
- Stroke: 78mm
- Shock Type: Piggyback, steel spring
- Weight: 3.3 lbs (1.5 kg) without spring
- Low-Speed Compression: 18 clicks
- High-Speed Compression: 24 clicks
- Rebound: 24 clicks
- Spring Preload: Adjustable
Spring Options
- Medium: 140 lbs - 180 lbs (80 N/mm spring)
- Heavy: 180 lbs - 220 lbs (90 N/mm spring)
Compatibility
- E Ride Pro SS 3.0
Important Notes:
- Requires the Prickly Sirris R38 Linkage Kit (sold separately).
- Stock E Ride Pro SS 3.0 linkage is not compatible.
- Optional CMX Dork Drop Clamp is recommended to maintain balanced chassis geometry.
Suspension Tuning Recommendations
| R38 Shock | Medium | Heavy |
|---|---|---|
| Compression Setting | LSC 16 / HSC 12 | LSC 14 / HSC 12 |
| Rebound Setting | 9 | 8 |
| Spring Rate (N/mm, lb/in) | 80 | 90 |
| Preload Setting (mm) | 4 | 4 |
| F43 CMX Fork | Medium | Heavy |
|---|---|---|
| Rider Weight (lbs) (No Gear) | 140-180 | 180-220 |
| Spring Rate (N/mm) | 3.6/3.6 | 4.0/3.6 |
| Fork Height in Upper Clamp (mm) | 6.5 | 6.5 |
| Compression Setting | 15 | 13 |
| Rebound Setting | 17 | 15 |
| Preload Setting (mm of preload R and L fork legs) | 4/4 | 4/4 |
| Oil Volume (Bath Oil) | 100cc | 110cc |
| Oil Weight* (bath/cartridge) | 20/5 | 20/5 |
| Headset Spacer 1mm thick washer beneath seal, PN 430-38-017 | None | |
| Steerer Spacer 5mm thick above top clamp / beneath top cap | 430-38-018 x4 | |
| Caliper Bracket | 430-22-034, 99.5mm | |
| Wheel Spacers | 430-22-016 x2 | |