Key Features
- Perfect upgrade for brushed 540- and 550-size brushed motors with the same diameter and mounting pattern (vehicle must accept pinions with a 5mm bore)
- High-quality 4-pole sintered rotors
- Includes 4mm gold plated bullet connectors
- Precision ball bearings and hardened steel 5mm shaft
Overview
Great choice for 1/10 Scale 4WD models. Low cog 4-pole 8-magnet rotor design, CNC machined aluminum housing, insulated high purity copper windings, high-quality alloy steel 5mm output shaft, and high-precision bearings for high durability and smooth rotation. Preinstalled with 4mm gold plated bullet connectors for easy installation. Perfectly matched for the Firma 130 Smart ESC.
Needed to Complete - Electronic Speed Control such as the Firma 130 Smart ESC
What's in the box? - Spektrum Firma 3660-3150kv Sensorless 1/10 Brushless Motor with 4mm Gold Plated Bullet Connectors
Overview
The SPM Firma 3150Kv Brushless Motor M-SPMXSM1000 is a high-performance brushless motor designed specifically for 1/10 scale RC vehicles across the UK and beyond. Whether you're upgrading an existing brushed setup or building a competitive RC car from scratch, this Spektrum motor delivers exceptional reliability, smooth power delivery and impressive durability that serious RC enthusiasts demand. This is the perfect choice for bashers, racers and hobbyists alike who want to unlock the full potential of their 1/10 scale 4WD models without breaking the bank.
As an authorised Spektrum dealer in the UK, we recognise that upgrading to brushless power is one of the most significant performance enhancements you can make to your RC car. The Firma 3150Kv motor represents a sweet spot in the brushless motor range—offering sufficient torque and acceleration for most 1/10 scale applications whilst maintaining excellent efficiency. This motor is compatible with your existing 540- and 550-size brushed motor mounting patterns, making it an ideal drop-in replacement for those looking to make the switch to brushless technology without extensive modifications to their chassis.
Spektrum, the recognised leader in spread spectrum technology and RC innovation, has engineered this motor with precision and attention to detail. The Firma 3150Kv is built to perform reliably lap after lap, whether you're tackling local track days in the UK or enjoying weekend bashing sessions at your favourite spot. Pair it with the recommended Firma 130 Smart ESC and you'll have a matched system that's been tested and proven to work together seamlessly.
Key Features
- Low Cog 4-Pole 8-Magnet Rotor Design — The advanced rotor configuration provides smooth, consistent power delivery and eliminates the cogging sensation that can affect performance and control during acceleration and deceleration, resulting in a more responsive and predictable driving experience across all throttle positions.
- CNC Machined Aluminium Housing — Precision-engineered from high-quality aluminium using computer-controlled machining, the motor housing is both lightweight and incredibly durable, providing excellent heat dissipation during extended running sessions and ensuring the motor remains cool even during high-performance driving.
- Insulated High Purity Copper Windings — The motor utilises premium quality copper wire with superior insulation, which reduces electrical resistance and maximises power transfer efficiency, meaning more of your battery's energy is converted into motor performance rather than being wasted as heat.
- High-Quality Alloy Steel 5mm Output Shaft — The hardened steel 5mm shaft is built to withstand the stresses and impacts that come with serious RC driving, providing excellent durability and compatibility with standard pinion gears that accept 5mm bores, ensuring reliable long-term performance even under extreme driving conditions.
- High-Precision Ball Bearings — Sealed, precision ball bearings provide smooth rotation with minimal friction, reducing drag and maximising motor efficiency whilst protecting the internal components from dirt and moisture that can degrade performance over time.
- Drop-In Replacement for Brushed Motors — This motor features the same diameter and mounting pattern as standard 540- and 550-size brushed motors, allowing you to upgrade without requiring modifications to your RC car chassis or mounting system, as long as your vehicle accepts pinions with a 5mm bore.
- 4mm Gold Plated Bullet Connectors Pre-Installed — High-quality gold-plated connectors are included and pre-fitted, ensuring excellent electrical contact, minimal voltage loss and maximum reliability during connection and disconnection, with the connectors providing a secure fit that won't corrode or degrade with repeated use.
- Perfectly Matched for the Firma 130 Smart ESC — Spektrum has engineered this motor to work in perfect harmony with the Firma 130 Smart ESC, creating a matched system that delivers optimal performance, reliability and efficiency when used together as intended.
Technical Performance
The SPM Firma 3150Kv Brushless Motor represents the pinnacle of Spektrum's engineering expertise, combining cutting-edge design with proven reliability. The 3150Kv rating means the motor will spin approximately 3150 revolutions per minute for every volt supplied, making it ideal for 1/10 scale 4WD models where a balance between acceleration and top speed is desired. The 4-pole sintered rotor construction uses high-grade sintered materials that provide consistent magnetic properties throughout the motor's lifespan, ensuring that performance remains predictable and reliable whether you're in your first run or your hundredth. The CNC machined aluminium housing isn't just about looks—it serves a critical function in heat management, dissipating the thermal energy generated during high-performance driving and keeping the motor's internal components operating at optimal temperatures. The insulated high-purity copper windings represent a significant step up from lower-grade alternatives, offering superior conductivity that translates directly into improved efficiency and responsiveness. The hardened steel 5mm shaft is precisely engineered to tight tolerances, eliminating wobble and runout that could compromise handling characteristics or cause premature wear. Built for UK RC enthusiasts who demand quality, this motor is equally at home on indoor carpet tracks, outdoor dirt courses or the unpredictable terrain of recreational bashing.
What's in the Box
- Spektrum Firma 3660-3150KV Sensorless 1/10 Brushless Motor
- 4mm Gold Plated Bullet Connectors (Pre-Installed)
What You Need to Complete
- Electronic Speed Control (ESC) — such as the Firma 130 Smart ESC for optimal performance and compatibility
- Battery — LiPo battery pack suitable for 1/10 scale brushless systems
- RC Receiver and Radio Transmitter
- Pinion Gear with 5mm bore
Frequently Asked Questions
- Is the SPM Firma 3150Kv motor suitable for beginners new to brushless RC? — Yes, absolutely. The 3150Kv rating makes this an excellent choice for those transitioning from brushed to brushless technology. It offers more progressive power delivery compared to higher KV ratings, making it more forgiving during the learning curve whilst still providing impressive performance once you've mastered the basics. When paired with the recommended Firma 130 Smart ESC, beginners benefit from electronic speed control features that make the driving experience smoother and more predictable.
- What is the difference between the 3150Kv Firma motor and other Spektrum brushless options? — The KV rating determines the motor's characteristics: lower KV numbers (like 3150Kv) provide more torque and acceleration but lower top speed, making them ideal for 1/10 scale 4WD vehicles and general-purpose driving. Higher KV motors sacrifice some torque for maximum speed. The Firma 3150Kv represents an excellent all-round choice for most 1/10 scale applications, balancing performance with versatility.
- Can I use this motor as a direct replacement for my brushed 540/550 motor? — Yes, this is one of the key advantages of the Firma 3150Kv design. It shares the same diameter and mounting pattern as standard 540- and 550-size brushed motors, allowing for a straightforward swap, provided your vehicle accepts pinions with a 5mm bore. You'll need to upgrade your ESC to a brushless-compatible unit like the Firma 130, but the motor itself will bolt directly into place without modifications.
- What battery and ESC do I need to use with this motor? — Spektrum recommends pairing this motor with the Firma 130 Smart ESC for optimal performance. This combination has been tested and engineered to work together seamlessly. For battery requirements, you'll need a LiPo battery pack suitable for 1/10 scale brushless systems—consult the Firma 130 ESC documentation for specific voltage and capacity recommendations.
- Is the Firma 3150Kv motor waterproof? — The motor housing is sealed with precision ball bearings that provide protection against splashes and moisture. However, for best longevity and reliability, it's recommended to avoid prolonged submersion or deliberate water exposure, particularly around the connector area where water ingress is most likely.
- How does the brushless technology of this motor compare to brushed alternatives? — Brushless motors like the Firma 3150Kv offer several significant advantages over brushed motors: they run cooler due to no brush friction, they're more efficient with better power delivery, they require virtually no maintenance, and they last considerably longer. You'll notice smoother acceleration, improved responsiveness and higher overall performance when you switch from brushed to brushless technology.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the SPM Firma 3150Kv Brushless Motor M-SPMXSM1000 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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