How to match an electric motor to an RC aircraft
A practical guide to motor KV, voltage, current, thrust, aircraft weight and flight style so the power system matches the model.
Firma 4685 1250Kv 4-Pole Brushless Motor, 6.5mm Bullet, 8mm Shaft
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Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
Firma 4685 1250Kv 4-Pole Brushless Motor, 6.5mm Bullet, 8mm Shaft is a Spektrum product intended for surface RC vehicles, crawlers, bashers and race setups that need dependable Spektrum control electronics. This page presents the practical buying information a customer needs before ordering: fit, SKU, image, category, specifications and usage advantages.
The content is written for purchasing through RC-MODEL, without supplier prices or links to competing stores.
Key Advantages
- Organized under the Spektrum electric motor range.
- Intended for surface RC vehicles, crawlers, bashers and race setups that need dependable Spektrum control electronics.
- Check model fit, connector type, voltage range and Spektrum protocol compatibility before ordering.
- Includes local product imagery and structured specifications for easier comparison inside RC-MODEL.
Core Specifications
- Manufacturer: Spektrum
- Brand: Spektrum
- Product Code: SPMXSM1205
- Product Family: Spektrum electric motor range
- Application: 1/7-1/5 scale, 8S Vehicles
- Compatibility Focus: Check model fit, connector type, voltage range and Spektrum protocol compatibility before ordering.
- Spektrum Category: Cars & Trucks / Parts, Electronics & Accessories / Motors
- Input Voltage: 12.0 - 35.2V
- Motor Type: Brushless
- Connector Type: 6.5mm Bullet
- Motor Size: 4685
- Outer Diameter: 1.81" (46 mm)
- Output: 4190W
- Product Length: 3.39" (86 mm)
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| Technical Specifications | |
| Manufacturer | Spektrum |
| Brand | Spektrum |
| Product Code | SPMXSM1205 |
| Spektrum Category | Cars & Trucks / Parts, Electronics & Accessories / Motors |
| Connector Type | 6.5mm Bullet |
| Product Family | Spektrum electric motor range |
| Application | 1/7-1/5 scale, 8S Vehicles |
| Compatibility Focus | Check model fit, connector type, voltage range and Spektrum protocol compatibility before ordering. |
| Input Voltage | 12.0 - 35.2V |
| Product Length | 3.39" (86 mm) |
| Product Weight | 21.75oz (618g) |
| Motor Type | Brushless |
| Output | 4190W |
| Motor Size | 4685 |
| Outer Diameter | 1.81" (46 mm) |
| Shaft Diameter | 0.313" (8 mm) |
Tags: Spektrum, SPMXSM1205, Spektrum electric motor range, Spektrum Catalog, Spektrum Motors, Spektrum Surface Electronics, RC-MODEL