Overview

The Hobbywing HW38010607 EZRUN MAX8 G2S ESC combo with 4278SD 2250kV motor represents the pinnacle of brushless RC performance for serious 1/8 scale enthusiasts across the UK. Whether you're piloting a demanding buggy through rough terrain or pushing a heavy-duty monster truck to its limits, this sensored brushless combo delivers the perfect balance of explosive power, intelligent control, and rugged reliability that competitive RC drivers demand. This is not an entry-level system—this is a purpose-built platform engineered for 1/8 scale vehicles that need to perform under extreme conditions, offering the kind of performance characteristics that separate weekend bashers from serious competitors.

The combo pairs Hobbywing's acclaimed EZRUN MAX8 G2S ESC with the matching 4278SD G2R motor, a pairing that has been specifically engineered by the manufacturer to recognise each other and unlock optimised performance capabilities. When connected together, the ESC automatically identifies the motor and adjusts its control algorithms to deliver the smoothest throttle response, the most predictable power delivery, and the most reliable protection systems available in this performance class. This level of integration means you're not just buying two separate components—you're investing in a cohesive system where every element has been tuned to work in perfect harmony.

Built for UK RC drivers who refuse to compromise, the HW38010607 combo combines waterproof construction rated to IP67, advanced turbo timing technology, Bluetooth connectivity for wireless setup and live telemetry, and intelligent thermal management that keeps your system running cool during extended sessions. Whether you're racing on-road, tackling off-road courses, or pushing through Short Course Truck championships, this combo provides the performance foundation that serious RC car UK builders and drivers expect.

Key Features

• 160A Continuous / 1050A Peak Current ESC — The EZRUN MAX8 G2S delivers exceptional current handling capability that provides rock-solid stability under sustained high-load conditions whilst maintaining the headroom to handle sudden acceleration bursts and aggressive throttle inputs without voltage sag or loss of control responsiveness.
• Sensored Brushless Motor with Linear Response — The 4278SD G2R motor uses sensored technology to provide silky-smooth, predictable throttle response and linear power delivery, eliminating the unpredictable cogging behaviour of sensorless designs and giving drivers complete confidence in their control authority across the entire throttle range.
• Waterproof and Dustproof IP67 Protection — Both the ESC and motor feature Hobbywing's patented waterproof design protecting the output shaft position and wire outlet housing with a new induction line interface, allowing this combo to effortlessly withstand snow, mud, water, dust, and harsh environmental conditions that would damage lesser electronics, ensuring all-weather operation capability.
• Turbo Timing up to 32 Degrees — The ESC supports adjustable turbo timing technology that allows you to electronically boost motor RPM by advancing the ESC's electronic timing, giving you up to a 25% performance increase when you need maximum acceleration and competitive edge, with full adjustability to match your specific racing conditions and driving style.
• Bluetooth Connectivity with HW LINK App — Built-in Bluetooth module enables wireless connection to your smartphone running the HW LINK app (iOS or Android), allowing you to adjust parameters, read live data including throttle amount, voltage, current, temperature and speed, perform firmware upgrades, and access detailed data logging of your recent runs without plugging in any external devices.
• 10-Minute Data Logging and Real-Time Telemetry — The integrated data recording module stores up to 10 minutes of your most recent run with full telemetry capture, enabling you to analyse performance, identify tuning opportunities, and troubleshoot issues through the HW LINK V2 app, whilst also supporting real-time data viewing for bench testing and diagnostics.
• Intelligent Frameless Fan Cooling System — The ESC features a patented frameless fan design with intelligent start and stop functionality that remains dormant during cool operation to reduce noise and power consumption, then automatically activates when the ESC reaches the preset temperature threshold, ensuring optimal thermal management whilst maintaining quiet operation during practice runs.
• Super 6A Switch-Mode BEC with Three Voltage Options — The built-in BEC delivers up to 6A continuous current with switchable voltage output of 6V, 7.4V, or 8.4V, giving you the flexibility to power high-voltage servos and receiver systems, with the 15A maximum peak capacity providing additional headroom for servo-intensive setups without requiring external BEC modules.
• Capacitor Overheating Protection — Advanced protection circuitry prevents damage to the power capacitors from extreme overloads or unexpected thermal events, safeguarding your entire ESC assembly from catastrophic failure and extending the operational lifespan of the control electronics.
• Premium Durable Construction Materials — The motor features a high-hardness aluminium alloy CNC-machined shell for structural rigidity, high-quality first-line brand bearings for smooth rotation, ultra-thin silicon steel sheets for efficiency, high temperature-resistant oxygen-free copper windings for reliability, and high-toughness alloy output shafts that can withstand the demands of aggressive driving without flexing or breaking.
• 60,000 RPM Maximum Speed Support with Enhanced Rotor Durability — The 4278SD G2R motor supports up to 60,000 RPM, representing a 9% increase compared to the previous G2 generation, with further enhanced rotor explosion-proof capability engineered to handle the additional stress of higher-speed operation whilst maintaining structural integrity.
• Waterproof Sensor Harness Compatibility — The combo includes a proven Hobbywing waterproof sensor harness that provides complete environmental protection for sensor-based systems, ensuring that the sensored technology continues to function reliably even when exposed to moisture, mud, and harsh conditions.

Technical Performance

The HW38010607 combo represents a significant step forward in 1/8 scale brushless RC performance. The EZRUN MAX8 G2S ESC is built on optimised hardware architecture that surpasses the previous G2 generation through intelligent freewheeling technology and refined circuit design, delivering both extreme output capability and silky throttle response that allows drivers to operate at the limit with complete confidence. With 160A continuous current and 1050A peak capacity, this ESC provides the electrical backbone for the highest-demand 1/8 scale applications including monster trucks, buggies, and truggy racing, whilst the optimised hardware ensures that stability and reliability improvements have been engineered throughout every circuit board. The matching 4278SD G2R sensored motor features a 42mm diameter by 78mm length construction producing 465 grams of solid performance, with a 2250kV rating specifically selected to work harmoniously with 3-6S LiPo battery configurations. The motor's sensored design ensures that power delivery remains linear and predictable throughout the entire throttle range, a critical advantage over sensorless alternatives when precise control authority is essential. The aluminium alloy CNC shell is manufactured to exacting tolerances, the front and rear bearings (D16×D5×T5 and D11×D5×T5 respectively) are sourced from first-line manufacturers for minimal friction and maximum durability, and the ultra-thin silicon steel laminations are precision-stacked to minimise eddy current losses and maximise efficiency. The high temperature-resistant oxygen-free copper windings can handle sustained current draw without degradation, whilst the high-toughness alloy output shaft resists the torsional stresses of full-throttle acceleration and hard cornering. Both components achieve IP67 waterproof and dustproof rating, meaning the system can operate reliably in muddy tracks, snowy conditions, wet grass, and dusty desert environments that would compromise lesser electronics. The ESC's intelligent thermal management through the frameless fan system ensures that even during extended high-demand running sessions, the internal temperature remains within the optimal operating window, preserving the lifespan of critical components and maintaining performance consistency throughout your driving session.

What's in the Box

• EZRUN MAX8 G2S ESC with dual XT-90 power connectors pre-installed
• 4278SD 2250kV G2R sensored brushless motor
• Waterproof sensor harness
• Input power wires

What You Need to Complete

• 3-6S LiPo battery (3000mAh or higher recommended for sustained performance)
• LiPo battery charger compatible with your chosen cell count
• RC vehicle chassis compatible with 1/8 scale 42mm diameter motors (1/8 buggy, 1/8 truck, or heavy-duty 1/10 monster truck)
• Receiver and servo(s) compatible with 6V-8.4V operation
• Motor connectors: 6.0mm gold bullet connectors
• Smartphone running HW LINK app (iOS or Android) for Bluetooth configuration and telemetry access
• Optional: alternative battery connectors available as aftermarket installation options (TRX, EC5, IC5, QS8)

Frequently Asked Questions

• What is the difference between the 4278SD and 4268SD motors in the EZRUN G2R lineup? — The 4278SD features a longer 78mm length producing 465 grams, a 2250kV rating suitable for 3-6S LiPo, and compatibility with 1/8 trucks and monster trucks, whilst the 4268SD is 68 grams lighter at 360 grams, features a 2500kV rating designed for 3-4S LiPo, and targets 1/8 buggies and 1/10 monster trucks. Both share the same 42mm diameter and sensored design, but the 4278SD delivers higher torque with lower top speed, making it ideal for monster truck applications requiring strong low-end power.
• Will the HW38010607 combo automatically identify and optimise for the matching motor? — Yes, this is one of the primary advantages of purchasing the matched combo rather than separate components. The EZRUN MAX8 G2S ESC is specifically designed to recognise the 4278SD G2R motor, and when properly connected, the ESC automatically adjusts its control algorithms to provide optimised performance and enables the motor overheat protection system to prevent thermal damage during extended high-demand running.
• What battery should I use with the HW38010607 combo? — The 4278SD G2R motor is rated for 3-6S LiPo battery configurations, with the motor limit function on the ESC set to 3000kV maximum on 4S and 2250kV maximum on 6S. For most 1/8 scale monster truck and buggy applications, a 4S or 5S LiPo battery in the 3000-5000mAh capacity range provides an excellent balance of runtime, acceleration, and weight distribution, though your specific vehicle chassis may have individual battery mounting requirements.
• How does the waterproof IP67 rating protect my electronics in wet conditions? — The IP67 protection rating indicates that the ESC and motor are splash-proof, water-resistant, and dustproof under normal use conditions. The patented waterproof design on the motor protects the output shaft position and wire outlet housing with a new induction line interface, whilst the ESC features similar comprehensive sealing of all external connectors and sensitive areas. This allows operation in muddy tracks, snowy conditions, wet grass, and dusty environments, although the protection is not permanent and prolonged submersion in water should be avoided.
• What does turbo timing do and how much performance increase will I see? — Turbo timing is an electronic advancement of the ESC's commutation timing that increases motor RPM beyond the standard point, essentially making the motor spin faster by providing more electrical timing advance. The EZRUN MAX8 G2S supports up to 32 degrees of turbo timing adjustment, which can provide approximately 25% more RPM when activated, giving your vehicle noticeably sharper acceleration and higher top speed. The feature is fully adjustable through the HW LINK app, allowing you to tune it precisely to your racing conditions, driving style, and vehicle setup.
• How do I use the Bluetooth connectivity and what information can I access? — The built-in Bluetooth module allows wireless connection to your smartphone using the free HW LINK app available for both iOS and Android. Once connected within approximately 5 metres range, you can adjust ESC parameters without physical programming plugs, read real-time data including throttle position, battery voltage, current draw, temperature, motor speed, and access stored telemetry data from your last 10 minutes of running. This wireless capability makes bench testing, parameter tuning, and performance analysis significantly more convenient than traditional wired programming methods.
• What is the difference between this G2S ESC and the previous MAX8 G2? — The G2S represents an evolution of the MAX8 G2 with optimised hardware design and application of intelligent freewheeling technology, resulting in further improvements to stability and reliability without changing the core power rating or fundamental architecture. The G2S maintains the same 160A continuous and 1050A peak current capability whilst refining the internal circuitry and thermal characteristics for enhanced longevity and consistency across extended operating sessions.
• Is the HW38010607 combo suitable for beginners? — Whilst the HW38010607 is engineered with sophisticated features including Bluetooth telemetry, data logging, and adjustable turbo timing, these elements are designed to be accessed only by those who wish to utilise them. A beginner can operate this combo with purely basic throttle input without engaging any advanced features, though the sensored motor design does require connection of a sensor harness. The combo is best suited to drivers with previous RC experience and understanding of 1/8 scale systems, motor concepts, and battery safety protocols.
• What connector types are used for battery and motor power? — The ESC arrives with dual XT-90 power connectors pre-installed on the battery input side, ensuring secure high-current connections with minimal resistance. The motor connects via 6.0mm gold bullet connectors, which are industry-standard connectors providing excellent contact reliability. Optional aftermarket connector installation services are available if you need to convert to TRX, EC5, IC5, or QS8 standards for compatibility with existing vehicle builds.
• How does the intelligent fan cooling system improve reliability? — The frameless fan features intelligent start and stop functionality that monitors the ESC's internal temperature and only activates fan operation when the temperature reaches a preset threshold. This approach reduces unnecessary power consumption during cool ambient conditions and lighter throttle operation, minimises noise pollution at lower speeds, reduces fan wear and extends fan lifespan, whilst ensuring that the ESC automatically cools itself whenever performance demands generate significant heat. The result is a control electronics package that runs cool and quiet during practice runs but maintains optimal thermal conditions during competitive racing.

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 HOBBYWING COMBO EZRUN MAX8 G2S ESC 4278SD-2250KV G2R MOTOR HW38010607 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.