Overview
The ARRMA 1/8 KRATON 6S EXB 4X4 RTR is the ultimate ready-to-run speed monster truck for bashers who demand extreme performance, ballistic velocity, and over-the-top off-road action. This latest evolution of the iconic KRATON platform comes fully loaded with enhanced upgrades that make it more rugged and driver-friendly than ever before. Whether you're an intermediate to experienced RC enthusiast searching for a high-performance brushless RC monster truck in the UK, the KRATON 6S EXB delivers jaw-dropping 65+ mph speeds combined with genuine durability for serious bashing sessions on dirt, gravel, and grass terrain.
With its menacing black matte and gloss finish, aggressive high-downforce wing, and imposing stance, the KRATON 6S EXB cuts an intimidating figure off-road. Yet despite its fearsome appearance, everyday maintenance is straightforward thanks to the innovative quick-release, clipless body retention system that provides fast, hassle-free chassis access whilst doubling as protection against body punch-through. This ready-to-run RC car UK model arrives fully assembled and equipped with professional-grade electronics, so you simply need to add a compatible LiPo battery and charger to begin your bashing adventure.
ARRMA has engineered the KRATON 6S EXB specifically for bashers who crave big air and unrelenting ground-pounding performance. Every component—from the 7075 T6 anodized aluminium chassis to the EXtreme Bash-hardened suspension system—contributes to high-speed confidence, responsive handling, and the durability needed to survive repeated high-impact impacts and aggressive driving.
Key Features
- EXtreme Bash 7075 T6 Anodised Aluminium Chassis and Components — The laser-etched 3mm chassis plate utilises aerospace-grade 7075 T6 anodised aluminium, providing exceptional rigidity and strength without excessive weight. This premium material resists bending and warping during extreme bashing, ensuring your truck maintains precision handling even after countless jumps and impacts. Red-anodised front and rear bulkheads, split tower-to-tower centre braces, and heavy-duty arms throughout the chassis deliver virtually unstoppable structural integrity.
- Spektrum Firma 150A Smart V2 Brushless ESC with IC5 Connectors — The updated B5.12 firmware delivers enhanced power delivery and punch, whilst the waterproof design protects against water ingress during wet-weather bashing. IC5 connectors provide secure, reliable power distribution to match the high-current demands of the 6S power system, ensuring zero voltage drop during aggressive acceleration and top-speed runs.
- Spektrum Firma 4074 2050Kv Brushless Motor with Cooling Fan and Heatsink — This efficient brushless motor generates massive torque and acceleration, paired with an integrated heatsink and cooling fan to maintain optimal operating temperatures during extended high-throttle sessions. The 2050Kv rating is specifically tuned for 6S LiPo performance, delivering the perfect balance of raw power and control.
- dBoots COPPERHEAD 2 Big Block Tyres on Multi-Spoke Wheels — These aggressive off-road tyres feature deep tread patterns designed for all-terrain traction across dirt, gravel, grass, and loose surfaces. Toughened wheel hubs with dual, rubber-shielded inner bearings provide additional smoothness and security, whilst the enlarged hubs resist impact damage from hard landings and aggressive cornering at speed.
- Oil-Filled Shock System with EXtreme Bash Towers — Plush, oil-filled shocks mounted on EXtreme Bash 7075 T6 anodised aluminium front and rear towers soak up bumps and absorption, absorbing landing impacts and maintaining suspension compliance over rough terrain. Emulsion shock caps and M4 shock standoffs add durability and prevent fluid leakage during extreme bashings.
- Spektrum S665 High-Torque Digital Servo with Steel Gears — Rated at 20kg of torque, this waterproof metal-geared servo delivers the muscular steering response needed to command the truck at full speed. Steel gears resist stripping under load, whilst the servo's precision ensures responsive handling feedback through the Spektrum SLT3 transmitter.
- Heavy-Duty All-Metal Drivetrain — Durable steel driveshafts, all-metal differential outdrives, and all-metal gearbox internals create a reliable, impact-resistant drivetrain engineered to withstand the punishing forces of high-speed bashing. Three-gear differentials provide optimal traction without sacrificing speed.
- Redesigned Sliding Servo Saver — The KRATON 6S EXB features an updated servo saver mechanism that reduces play and offers greater activation torque, resulting in precise steering control and superb driving feedback even during aggressive manoeuvres and high-speed cornering.
- Spektrum 2.4GHz SLT3 Transmitter with Throttle Limiting — The included high-quality 3-channel transmitter is perfect for drivers of all experience levels. Its throttle limiting feature allows new drivers to safely limit maximum speed to 50% or 75%, building confidence and control skills before unleashing full performance. Four AA batteries are included.
- Spektrum SR315 Dual Protocol Receiver — This 3-channel receiver supports multiple Spektrum protocols, ensuring compatibility with the SLT3 transmitter whilst offering flexibility for future upgrades and customisation.
- Quick-Release, Clipless Body Retention System — The iconic streamlined KRATON body attaches without clips, allowing one-handed removal for rapid chassis access and maintenance. This system also prevents body punch-through during extreme landings and hard impacts.
- EXtreme Bash Front Bumper and Steel Rear Skid Plate — Protective bumpers and skid plates shield critical components from impact damage, extending the lifespan of your investment and reducing maintenance downtime between bashing sessions.
- Steel Turnbuckles Throughout — Heavy-duty steel steering and rear turnbuckles enable the KRATON 6S EXB to withstand extreme off-road bashing at 65+ mph top speeds, whilst allowing fine-tuning of suspension geometry for optimal handling characteristics.
Technical Performance
The ARRMA KRATON 6S EXB 4X4 is engineered as a serious performance machine for intermediate to experienced bashers. Measuring 596mm in length, 466mm in width, and 216mm in height with a wheelbase of 377mm, this 1/8 scale monster truck delivers commanding presence and stability across challenging terrain. Weighing 5.61kg fully assembled, the truck achieves an ideal weight distribution that balances momentum for big air performance with control precision for technical driving. The Spektrum Firma 4074 2050Kv brushless motor paired with the Spektrum Firma 150A Smart V2 ESC with updated B5.12 firmware produces ballistic speeds exceeding 65 mph, making this one of the fastest ready-to-run RC monster trucks available in the UK market. The motor features an ARRMA heatsink and cooling fan to maintain optimal temperatures during sustained high-throttle runs. The truck utilises a 6S LiPo power system (compatible with 4S and 6S batteries), delivering massive voltage and current capacity for sustained acceleration and top-end speed. The brushless drivetrain incorporates a 16T pinion meshed with a 50T spur gear, providing direct power transfer from motor to wheels through robust steel driveshafts and all-metal differential outdrives. The independent suspension system features coil-over oil-filled shocks with EXtreme Bash 7075 T6 anodised aluminium towers front and rear, ensuring smooth ride quality even at extreme speeds and impact scenarios. The 17mm wheel hexes accept a wide range of aftermarket wheels and tyres, whilst the included dBoots COPPERHEAD 2 big block tyres provide exceptional all-terrain traction. Water-resistant electronics protect against moisture ingress, though the truck is not fully submersible. The integral braking system is controlled through the ESC, providing smooth deceleration and reverse capability. All IC5 connectors ensure reliable power distribution, whilst the Spektrum 2.4GHz SLT3 radio system provides responsive control across distances suitable for large-scale outdoor bashing sessions.
What's in the Box
- KRATON 6S EXB 4X4 1/8 Scale Speed Monster Truck RTR (fully assembled, ready to run)
- Spektrum Firma 150A Smart V2 Brushless 6S ESC with updated B5.12 firmware and IC5 connectors
- Spektrum Firma 4074 2050Kv Brushless Motor
- Spektrum 2.4GHz SLT3 3-Channel Transmitter
- Spektrum SR315 3-Channel Dual Protocol Receiver
- Spektrum S665 20kg Waterproof Metal-Geared Digital Servo
- 25T Spline Aluminium Servo Horn
- Four AA Transmitter Batteries
- Moulded Hand Tools (2.0mm and 2.5mm)
- Instruction Manual (multilingual)
What You Need to Complete
- LiPo Battery Pack — Either two 2S packs, two 3S packs, one 4S pack, or one 6S hardcase LiPo with EC5 or IC5 connector (sold separately). The 6S configuration delivers maximum performance and speed.
- Battery Charger — A compatible LiPo balance charger with appropriate voltage rating for your chosen battery configuration (sold separately).
- Charging Safety Bag — A LiPo safety sack or charging bag to safely charge and store batteries (sold separately).
Frequently Asked Questions
- What is the top speed of the ARRMA KRATON 6S EXB, and is it suitable for high-speed bashing? — This brushless RC monster truck is capable of exceeding 65 mph with a 6S LiPo battery, making it one of the fastest ready-to-run models available for UK buyers. It is specifically engineered for intermediate to experienced bashers who crave extreme speed and aggressive off-road action. The powerful 2050Kv motor and 150A ESC deliver ballistic acceleration, whilst the robust EXtreme Bash chassis and suspension are designed to absorb the impacts inherent in high-speed bashing. This truck excels at jumps, ramps, and aggressive terrain.
- Is the KRATON 6S EXB RTR suitable for beginners, or do I need experience to operate it? — ARRMA rates this model as suitable for intermediate to experienced drivers. Whilst the truck is ready to run (RTR) and includes everything except battery and charger, the extreme speed (65+ mph) and power require competent driving skills to operate safely. However, the included Spektrum SLT3 transmitter features a throttle limiting function that allows beginners to restrict speed to 50% or 75%, building confidence before unlocking full performance. We recommend experienced RC hobbyists or those with prior RC vehicle experience operate this truck at full power.
- What battery does the KRATON 6S EXB need, and how long does it run? — The truck is compatible with 4S and 6S hardcase LiPo batteries. A 6S battery (22.2V nominal) delivers maximum performance and top speed, whilst 4S batteries (14.8V) provide more conservative performance. Typical runtime is 10-15 minutes per battery pack at full throttle, depending on driving style, terrain, and battery capacity. Battery packs are sold separately; RC Model Shop offers power bundles combining batteries, chargers, and safety equipment for convenience.
- What makes this model different from other 1/8 scale RC monster trucks available in the UK? — The KRATON 6S EXB distinguishes itself through several innovations: the EXtreme Bash programme delivers premium materials like 7075 T6 anodised aluminium throughout the chassis, bulkheads, and shock towers for superior durability; the Spektrum Firma 150A Smart V2 ESC with updated B5.12 firmware provides enhanced power delivery and reliability; the Spektrum S665 steel-geared servo offers high-torque, waterproof steering precision; and the quick-release, clipless body retention system allows tool-free chassis access. The combination of these features, coupled with 65+ mph ballistic speed and aggressive styling, makes the KRATON 6S EXB exceptional value for serious UK bashers.
- Is the KRATON 6S EXB waterproof, and can I use it in wet conditions? — The ESC and receiver are water-resistant, providing protection against splashes and light rain. However, the truck is not fully waterproof and should not be submerged or driven through water crossings. Water-resistant electronics are designed to withstand typical mud and wet grass bashing, but extended water exposure may damage components. Always dry the truck thoroughly after wet-weather use and inspect electronics for moisture.
- Does the KRATON 6S EXB come with a battery and charger, or are these sold separately? — The truck is ready to run (RTR) but requires a separate LiPo battery pack and compatible charger. These are essential items sold separately. RC Model Shop offers complete power bundles combining the truck with matched battery, charger, balance leads, and safety equipment, providing all necessary items to get bashing immediately.
- What is the EXtreme Bash (EXB) upgrade programme, and how does it improve durability? — EXtreme Bash is ARRMA's premium durability initiative, incorporating reinforced materials and engineering throughout the chassis. EXB-hardened components include 7075 T6 anodised aluminium bulkheads, shock towers, and braces; heavy-duty suspension arms and plates; toughened wheel hubs with dual rubber-shielded bearings; and upgraded drivetrain internals. These upgrades collectively enhance impact resistance, reduce wear, and extend the operational lifespan of the truck during aggressive bashing.
- What is included in the hand tools, and will I need additional tools for setup and maintenance? — The truck includes moulded hand tools with 2.0mm and 2.5mm hex heads, suitable for basic adjustment and maintenance tasks such as servo horn adjustment and motor timing. For comprehensive maintenance and tuning, you may benefit from a dedicated RC tool kit including additional hex sizes, screwdrivers, and lubricants, though these are optional.
- Can I upgrade components on the KRATON 6S EXB, and what aftermarket support is available? — Yes, the KRATON platform enjoys extensive aftermarket support with replacement and upgrade parts available from ARRMA and numerous RC retailers. Upgradeable components include tyres and wheels, shocks, servo, motor, ESC, and numerous chassis parts. The exploded-view diagram and parts catalogue available from ARRMA facilitate easy identification of replacement parts. RC Model Shop stocks genuine ARRMA replacement and optional parts for continued customisation.
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 1/8 KRATON 6S EXB 4X4 RTR Speed Monster Truck Black C-ARA8708V6T1 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.
Parts Diagrams
Front Assembly
Steering Assembly
Chassis Assembly
Electronics
Rear Assembly
Front & Rear Diff Assembly
Centre Diff Assembly
Shock Absorber Assembly
Bodyshell / Clipless System / Wing / Wheel & Tyre
