ARRMA Mega 550 12T Brushed Motor AR390175

• Brand: ARRMA
• Model Number: Z-AR390175
• EAN Code: 5052127029698
• Motor Type: Brushed
• Motor Turns: 12T (12-turn)
• Motor Size: 550
• Motor Bore Diameter: 3.2mm
• Motor Connector Type: 4mm Bullet Crimp Terminal
• Compatible Battery Types: 6-cell NiMh, 7-cell NiMh, 2S LiPo
• Recommended Voltage: 6-7 cell NiMh or 2S LiPo
• Motor Characteristics: Straight-line pace with low-speed torque balance
• Included Accessories: ARRMA branded decal
• Quantity Included: 1 x Motor
• Colour: Black (with ARRMA decal)
• RRP: £32.50

Overview

The ARRMA Mega 550 12T Brushed Motor Z-AR390175 is a high-quality brushed motor specifically engineered to deliver exciting and consistent performance in all conditions. Whether you're a seasoned RC enthusiast in the UK or just discovering the world of RC cars, this brushed motor offers an excellent balance of reliability, value and driving excitement. The 12T brushed design provides the perfect combination of straight-line pace and low-speed torque, making it an ideal choice for anyone looking to upgrade their ARRMA vehicle with genuine performance improvements.

This motor is built to ARRMA's exacting standards and is the perfect power solution for ARRMA basher vehicles. Brushed motors remain a favourite among RC hobbyists because they offer straightforward operation, easy maintenance and proven reliability. Unlike brushless systems, brushed motors deliver smooth, responsive power delivery that many drivers prefer for recreational bashing and learning. The 550 size class is a recognised standard in RC car motors, ensuring compatibility with ARRMA vehicles and easy sourcing of spare brushes and maintenance components across the UK RC hobby market.

At an incredible price point, the ARRMA Mega 550 12T represents outstanding value for money. This is genuine ARRMA original equipment that will transform your RC car's acceleration and top speed, whether you're tackling tarmac, grass or rough terrain. The motor comes ready to install with standard 4mm bullet connectors, making installation straightforward for most ARRMA enthusiasts.

Key Features

• 12T High-Quality Brushed Motor Design — The 12-turn brushed configuration provides the perfect balance between acceleration and top speed, delivering straight-line pace for high-speed runs whilst maintaining excellent low-speed torque for realistic driving control and responsive handling in all conditions.
• 550 Size Motor Class — The 550 size is the recognised standard for mid-range RC car motors, ensuring reliability, proven performance and easy availability of replacement parts and upgrades across the UK RC hobby community.
• Perfect Balance of Performance Characteristics — This motor excels at combining straight-line speed with low-speed torque, making it versatile enough for bashing, recreational driving and sport driving without requiring constant setup adjustments.
• Eye-Catching ARRMA Branded Decal — The motor features a cool ARRMA decal that not only provides authentic factory branding but also makes motor recognition easy when working on your vehicle or comparing setups with other RC enthusiasts.
• Flexible Battery Compatibility — This motor is capable of running on either 6-cell or 7-cell NiMh batteries, or alternatively on 2S LiPo packs, giving you tremendous flexibility to use whatever battery system you already own or prefer to use with your RC vehicles.
• Standard 4mm Bullet Connectors — The motor uses industry-standard 4mm bullet crimp terminals, ensuring compatibility with most ARRMA vehicles and making connection and disconnection simple and reliable without requiring proprietary adapters.
• 3.2mm Bore Diameter — The precisely engineered 3.2mm bore ensures perfect fit and alignment with ARRMA motor mounts and shafts, guaranteeing smooth operation and eliminating vibration that could affect handling or durability.

Technical Performance

The ARRMA Mega 550 12T Brushed Motor represents professional-grade engineering combined with practical, user-friendly design. At 550 size with 12 turns, this motor delivers the sweet spot for ARRMA vehicles — enough power to achieve genuinely impressive speeds whilst maintaining the low-speed control and torque needed for realistic, satisfying driving. The brushed commutator and high-quality copper windings ensure efficient power transfer from your battery to the wheels, with minimal energy loss compared to poorly manufactured alternatives. The 3.2mm bore diameter is precisely machined to ARRMA's specifications, ensuring perfect fit within your vehicle's motor mount system and eliminating the play or slop that can cause vibration, noise and premature bearing wear. This motor accepts 6-7 cell NiMh batteries or 2S LiPo packs, giving you remarkable flexibility in your RC car setup. For drivers in the UK looking to experience the difference genuine ARRMA components make, this motor delivers measurable performance improvements in acceleration, top speed and overall driving responsiveness. The brushed design means maintenance is straightforward — brush replacement is simple and inexpensive, making this an economical choice for regular bashers who appreciate easy serviceability alongside performance.

What's in the Box

• 1 x ARRMA Mega 550 12T Brushed Motor with 4mm bullet connectors and ARRMA decal

What You Need to Complete

• Compatible ARRMA vehicle with motor mount fitted
• Speed controller (ESC) rated for brushed motors
• Battery pack — either 6-cell or 7-cell NiMh or 2S LiPo battery
• Battery charger suitable for your chosen battery type

Frequently Asked Questions

• Is the ARRMA Mega 550 12T Brushed Motor suitable for beginners to RC? — Yes, absolutely. Brushed motors are excellent for beginners because they are simple to operate, require minimal setup, and are easy to maintain. The straightforward design means fewer things can go wrong, and replacement parts like brushes are inexpensive and simple to fit yourself. The flexible battery compatibility (NiMh or 2S LiPo) also means beginners can start with affordable NiMh batteries and upgrade to LiPo later without needing a new motor.
• What battery does the ARRMA Mega 550 12T need? — This motor is compatible with either 6-cell or 7-cell NiMh batteries, or 2S LiPo packs. This flexibility is one of the motor's greatest strengths — it means you can use whichever battery system suits your budget and preferences. A 6-cell NiMh pack will provide safe, reliable power with good runtimes. A 7-cell NiMh pack offers slightly more speed and power. A 2S LiPo pack will deliver the maximum performance from this motor, though requires a compatible LiPo-ready ESC and proper LiPo charging equipment.
• What connector type does this motor have? — The ARRMA Mega 550 12T comes fitted with industry-standard 4mm bullet crimp terminals. These are universally used across RC hobby and are compatible with most ESCs and batteries. If you need to change connectors, replacement bullet terminals are readily available from RC shops across the UK.
• Is this a genuine ARRMA motor or a third-party clone? — This is 100% genuine ARRMA original equipment manufactured to ARRMA's specifications. You can verify authenticity by checking the model number Z-AR390175 and the EAN code 5052127029698. When you purchase from authorised ARRMA retailers, you receive genuine components with ARRMA's quality guarantee.
• Will this motor fit my ARRMA vehicle? — Yes, provided your ARRMA vehicle has a standard motor mount designed for 550-size motors. Most ARRMA brushed vehicles use the 550 size class. The 3.2mm bore is the standard size. However, always verify your vehicle's compatibility before ordering by checking your vehicle's manual or contacting the retailer.
• What is the difference between this brushed motor and a brushless motor? — Brushed motors use carbon brushes that ride on a spinning commutator, making them simple, durable and easy to maintain — brush replacement is a five-minute job that costs just a few pounds. Brushless motors are more efficient and offer higher top speeds, but require more complex electronic control and are more expensive to repair if damaged. For learning, casual bashing and reliable fun, brushed motors are ideal.

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 ARRMA Mega 550 12T Brushed Motor Z-AR390175 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.

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