The FMS FCX18S 1/18 GMC Sierra S RTR Brushless Rock Crawler is a premium scale crawler featuring a powerful brushless motor, full-time 4WD, portal axles, and oil-filled shocks. This RC rock crawler excels at low-speed technical crawling on rocks, dirt, or indoor obstacles, with a detailed GMC Sierra body, functional LED lighting, and realistic scale accessories. Its brushless power and RTR package make it a top choice for hobbyists seeking enhanced performance in a compact scale crawler.
Performance
The brushless motor delivers strong low-end torque and precise control for technical crawling. The 4WD system with portal axles provides excellent ground clearance and traction over obstacles. Adjustable oil-filled shocks and multi-link suspension allow fine-tuning for different terrain. Speeds are kept low and controlled, prioritizing precision and articulation. Runtime averages 25–35 minutes on a recommended 2S or 3S LiPo battery.
Build Quality
Reinforced composite chassis with metal portal axles, steel C-channel frame, and sealed ball bearings ensure excellent durability. The polycarbonate GMC Sierra body with scale details survives rollovers and light crashes. Waterproof electronics protect against dust and splashes. The brushless upgrade significantly improves power and reliability compared to brushed versions.
Control
The included 2.4GHz transmitter offers full proportional steering and throttle with good range. Response is smooth with minimal lag—ideal for precise line choice on technical terrain. Steering trim and throttle endpoints are adjustable. Transmitter requires 4×AA batteries (not included).
Design and Features
Officially licensed GMC Sierra S body with realistic details, functional LED headlights/taillights, and scale accessories. Quick battery access and clipless design make maintenance convenient. The crawler arrives fully factory-assembled and tuned for immediate trail use.
Special Notes: This is a Ready-to-Run model, fully assembled with the crawler, 2.4GHz transmitter, and instructions included. **Battery and charger are NOT included** — requires 2S or 3S LiPo battery and compatible charger (not supplied). Transmitter requires 4×AA batteries (not included). Suitable for intermediate users seeking brushless power in a scale crawler.
Specs & Features
- 1/18 scale licensed GMC Sierra S 4WD crawler
- Brushless motor with portal axles
- Oil-filled shocks & multi-link suspension
- LED headlights/taillights
- Waterproof electronics
- Metal portal axles & steel C-channel frame
- 2.4GHz transmitter
Pros & Cons (Real User Feedback)
| Pros |
Cons |
| ✓ Brushless power upgrade |
✗ Battery and charger not included |
| ✓ Excellent scale detail & GMC license |
✗ Transmitter batteries not included |
| ✓ Strong low-speed torque & articulation |
✗ Plastic hexes wear on abrasive rocks |
| ✓ Compact yet capable crawler |
✗ Higher price for brushless version |
| ✓ LED lights enhance realism |
✗ Small size limits very large obstacles |
