Overview
Step up to unstoppable 4x4 monster truck bashing with the 1/10 scale ARRMA GRANITE MEGA 665 RTR. This ready-to-run RC monster truck offers amped-up power and toughness straight out of the box, making it an ideal choice for anyone looking to enter the world of RC car driving or upgrade from a basic model. Now equipped with an 11% larger brushed motor and a 3S brushless-ready transmission, the GRANITE MEGA 665 delivers performance and power that grow right along with your skills. Whether you're a newcomer to RC hobbies or an experienced basher looking for a reliable platform, this brushed 4WD monster truck provides genuine value with professional-grade electronics and construction that will handle serious off-road abuse.
There's no better way to start your off-road bashing adventure than with the ARRMA GRANITE. This updated GRANITE MEGA 665 4x4 takes the popular brushed monster truck's impressive capabilities to the next level, combining proven durability with modern features that appeal to both casual weekend bashers and more serious RC enthusiasts. The aggressive styling, high ground clearance, and robust build quality make it a standout choice in the ready-to-run RC market. If you're searching for a dependable, powerful brushed RC monster truck UK enthusiasts trust, the GRANITE MEGA 665 delivers everything you need in one complete package.
Unlike many entry-level ready-to-run RC cars, this ARRMA model comes with high-quality Spektrum electronics included, meaning you're not compromising on control or reliability just because it's ready to run out of the box. Later, when you're ready for even bigger performance, upgrading the transmission to a brushless power system is drop-in easy, allowing your investment to grow with your expertise and ambitions.
Key Features
- High-Torque MEGA 665 Brushed Motor — The 14-turn MEGA 665 high-torque brushed motor is faster, more powerful, and 11% larger than the 550-size motor found on predecessor models, delivering superior acceleration and sustained power delivery for aggressive off-road driving conditions.
- 3S Brushless-Ready Transmission — The transmission is already equipped and pre-configured for 3S brushless power compatibility, meaning you can perform a straightforward upgrade to brushless performance whenever you choose without needing to replace the entire drivetrain, future-proofing your investment.
- Maintenance-Free Overload Coupling — Instead of a traditional slipper clutch that requires regular adjustment and maintenance, this monster truck features a maintenance-free overload coupling (torque limiter) that protects the transmission from damage caused by excessive torque whilst eliminating the need for ongoing service.
- Aluminium Motor Heatsink and 35mm Cooling Fan — The included aluminium heatsink and large 35mm motor cooling fan work together to keep the brushed motor operating at optimal temperatures during extended bashing sessions, boosting both efficiency and overall performance.
- Spektrum 2-in-1 40A Waterproof ESC and Receiver — The included Spektrum SLT 2-in-1 40A electronic speed controller combines the ESC and receiver into a single waterproof unit with IC3 connectors, simplifying the electronics installation whilst ensuring reliable operation in wet conditions typical of UK outdoor terrain.
- Spektrum SLT2 2.4GHz Transmitter with Adjustable Throttle Limits — The included foam-wheel transmitter is perfectly balanced for fatigue-free bashing and allows throttle limiting at 50% or 75%, enabling less experienced bashers to learn vehicle control before unleashing the full speed potential of this 4WD machine.
- Spektrum S661 Waterproof Metal Gear Digital Servo — Precise steering control comes from this included Spektrum servo, which produces 125 oz-in of torque at 6V and features waterproof metal gears, ensuring responsive handling during high-speed manoeuvres and rough terrain navigation.
- Aggressive GRANITE Monster Truck Body with Clipless Retention — The realistic, factory-finished body styling is held securely in place by a hidden clipless body retention system that preserves the aggressive, scale-like appearance whilst allowing quick body removal for maintenance and customisation.
- All-Terrain Independent Suspension with Oil-Filled Coilover Shocks — The suspension geometry and oil-filled, coilover shock absorbers work together to soak up bumps and impacts across rough terrain, whilst adjustable ride height allows you to increase ground clearance for navigation of uneven surfaces.
- Multi-Surface dBoots Fortress MT Vented Tyres — The included dBoots Fortress MT tyres feature a multi-surface tread pattern and vent holes that improve traction and allow water and dirt to escape, providing awesome grip across all conditions from dirt tracks to gravel and short grass bashing grounds.
- Ventilated Composite Chassis with Extended Side Guards — The durable, ventilated composite chassis keeps onboard components cool during use, whilst extended height side guards provide maximum protection from dirt, debris, and impacts on rocky or obstacle-filled terrain.
- Impact-Absorbing Bumpers and Driveshaft Stone Guard — Front and rear bumpers absorb impacts from collisions and jumps, whilst a driveshaft stone guard protects the drivetrain from rocks and sticks, extending the lifespan of mechanical components during intensive bashing.
- Tough Nylon Wheels with Foam Inserts — Multi-spoke pattern wheels constructed from tough nylon and fitted with foam inserts improve grip and handling whilst maintaining durability across multiple terrain types and bashing styles.
- Ready-to-Run Out of the Box — This is a complete ready-to-run system requiring only the addition of a compatible 2S LiPo battery and charger, meaning you can be bashing within hours rather than days spent on assembly and calibration.
- Shock Tower Protector — Included protection for the shock tower area prevents damage from impacts and crashes, safeguarding one of the most vulnerable suspension components during aggressive off-road driving.
- Adjustable Battery Straps — The battery retention system features adjustable straps that accept your choice of 2S hardcase LiPo battery, providing flexibility in battery selection based on your preferred runtime and power delivery characteristics.
- Two-Year Limited Warranty — ARRMA backs this product with comprehensive two-year coverage, demonstrating confidence in the build quality and providing peace of mind for your investment.
Technical Performance
The ARRMA GRANITE MEGA 665 represents a significant step forward in brushed monster truck design, particularly regarding power delivery and thermal management. The 14-turn MEGA 665 brushed motor, enhanced by a professional aluminium heatsink and active 35mm cooling fan, delivers high-torque performance whilst maintaining consistent output during extended driving sessions. The 15T pinion gear meshes with a 57-tooth spur gear for a 2.85:1 internal gear ratio, delivering impressive acceleration and a top speed of 20+ mph—plenty of pace for recreational bashing whilst remaining manageable for developing drivers. The Spektrum SLT 2-in-1 40A waterproof ESC features LiPo-ready circuitry with IC3 connectors, compatible with 2S hardcase LiPo batteries up to 138 x 51 x 48mm (6.5 x 2.01 x 1.89 inches) in dimension. The 4WD drivetrain with independent suspension, oil-filled coilover shocks, and multi-surface dBoots Fortress MT tyres with vented construction provide confident traction across dirt, gravel, and grass terrain typical of UK bashing locations. At 3.47kg (7.65 lbs) and measuring 470mm in length, 340mm in width, and 204mm in height, the GRANITE is substantial enough to feel robust without becoming unmanageable, with an 284mm wheelbase delivering stable handling characteristics. The maintenance-free overload coupling transmission protector eliminates the frustration of slipper clutch adjustment, whilst the ventilated chassis design prevents component overheating during intensive use. Overall build quality reflects ARRMA's commitment to durability, with extended side guards, shock tower protection, and driveshaft stone guard helping to protect vulnerable components during the inevitable crashes and collisions that come with aggressive RC bashing.
What's in the Box
- GRANITE MEGA 665 4x4 1/10 Scale Monster Truck RTR (fully assembled)
- Spektrum SLT 2-in-1 40A LiPo Ready Waterproof ESC and Receiver with IC3 Connectors
- MEGA 665 14T High Torque Brushed Motor with ARRMA Heatsink and 35mm Cooling Fan
- Spektrum SLT2 2.4GHz Transmitter with foam wheel and dual-rate throttle limiting
- Spektrum S661 Waterproof Metal Gear Digital Servo
- Four AA Transmitter Batteries
- Moulded Hand Tools 2.0mm and 2.5mm
- Instruction Manual (multilingual)
What You Need to Complete
- 2S Hardcase LiPo Battery (maximum 138 x 51 x 48mm, recommended minimum 5000mAh 30C capacity)
- Compatible Battery Charger (AC mains charger recommended for convenient home charging)
- LiPo Safe Charging Bag (for safe battery storage and charging)
Frequently Asked Questions
- Is the ARRMA GRANITE MEGA 665 suitable for beginners? — Yes, this ready-to-run 4WD monster truck is specifically designed with beginners in mind. It comes fully assembled with no RC car setup required, includes high-quality Spektrum electronics, and the transmitter features adjustable throttle limiting at 50% and 75% to help new drivers learn control before accessing full speed. The rugged construction tolerates the inevitable crashes that come with learning off-road driving.
- What battery does this brushed RC monster truck need? — The GRANITE MEGA 665 requires a single 2S hardcase LiPo battery with dimensions not exceeding 138 x 51 x 48mm (6.5 x 2.01 x 1.89 inches). A recommended minimum specification is 5000mAh capacity with 30C discharge rating, though compatible batteries with higher specifications will provide improved performance and runtime. The ESC features IC3 connectors for secure battery connection.
- Can I upgrade this RC truck to brushless power? — Yes, one of the standout features of the GRANITE MEGA 665 is that the transmission is pre-configured as 3S brushless-ready. When you decide to upgrade to brushless performance for higher efficiency and greater power output, the swap is straightforward and doesn't require transmission replacement, making this a cost-effective path to enhanced performance.
- How does the maintenance-free overload coupling differ from a slipper clutch? — Traditional slipper clutches require regular adjustment and maintenance to function properly. The ARRMA GRANITE MEGA 665 features an overload coupling (torque limiter) that automatically protects the transmission from damage caused by excessive torque, eliminating the need for ongoing adjustment whilst providing superior protection and lower maintenance requirements.
- What is the top speed of this 4WD monster truck? — The GRANITE MEGA 665 achieves a top speed of 20+ mph, which provides genuine excitement and satisfying performance for recreational bashing whilst remaining accessible to developing drivers who are building their RC control skills.
- What makes the dBoots Fortress MT tyres special? — The included dBoots Fortress MT tyres feature a multi-surface tread pattern designed for confident grip across varied terrain types, from dirt and gravel to short grass. The vented construction allows water and dirt to escape whilst improving traction, meaning better performance in wet UK conditions and after muddy off-road sessions.
- Is the GRANITE MEGA 665 waterproof? — The electronics are water-resistant rather than fully waterproof, meaning the Spektrum SLT 2-in-1 ESC and S661 servo can handle splashes and wet conditions typical of UK outdoor driving, though the truck should not be submerged in water. This level of protection is suitable for bashing in rain and muddy conditions.
- How long does a 2S LiPo battery last on this RC monster truck? — Runtime varies depending on driving style and battery capacity, but a typical 5000mAh 2S LiPo battery will generally provide 15-25 minutes of continuous driving. More aggressive driving depletes the battery faster, whilst controlled driving extends runtime.
- What is included in the Spektrum SLT2 transmitter? — The transmitter features a 2.4GHz frequency with a foam wheel for precise fingertip control, dual-rate throttle limiting (50% and 75% settings), and requires four AA batteries for operation. The balanced design minimises fatigue during extended bashing sessions.
- What size are the wheels on this monster truck? — The GRANITE MEGA 665 features tough nylon wheels with 14mm hex sockets to accept the included suspension components and dBoots Fortress MT tyres.
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 GRANITE MEGA 665 1/10 Brushed 4WD Monster Truck – Orange – C-ARA4202V4T3 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.
