Overview
The ARRMA 1/8 MOJAVE 4S 4X4 BLX Desert Truck RTR represents the perfect sweet spot for RC enthusiasts in the UK seeking a ready to run RC car that delivers genuine brushless performance without the complexity of a full race build. This 1/8 scale desert truck sits comfortably between entry-level 3S bashers and the extreme power of massive 6S machines, offering buyers the best of both worlds: legendary ARRMA durability combined with Spektrum brushless technology that's capable of 50+ mph under optimum conditions. Whether you're a seasoned RC basher, a weekend driver, or someone discovering the world of electric RC vehicles for the first time, the MOJAVE 4S provides an accessible entry point into serious brushless RC performance.
What makes this ready to run RC desert truck special is its combination of factory-installed quality components and genuine design innovations. The introduction of a rugged centre differential to the ARRMA 4S BLX 4X4 platform marks a significant upgrade, delivering truly awesome traction and handling characteristics that transform how the vehicle behaves across different surfaces. With a heavy-duty composite chassis enhanced with EXB (EXtreme Bash) components where the extra toughness is needed most, the MOJAVE 4S is built to handle the rigours of off-road, dirt, grass, parking lot, paved and asphalt driving without compromise. This isn't just another brushless RC truck; it's a purpose-designed platform that brings together proven ARRMA engineering with contemporary Spektrum electronics to create a machine that's genuinely ready to run straight from the box.
The 1/8 scale desert truck body design adds genuine visual appeal to the performance package, complete with a detailed cockpit, roll cage, and roof rails that deliver scale realism. Available in multiple colour options with factory-finished painted bodywork, decals and trim included, the MOJAVE 4S looks as impressive as it performs. The addition of multiple layers of defence against dirt and debris—including wishbone dirt guards, chassis dirt drain, outdrive guards, and an inner body with scale details—means this ready to run RC model is engineered for the real world, where genuine off-road use involves mud, rocks, and challenging terrain.
Key Features
- 4S LiPo-Capable Spektrum Brushless Power System — The factory-installed Spektrum Firma 3668 2400Kv brushless motor delivers incredible acceleration and genuine 50+ mph capability, whilst the waterproof Spektrum Firma 120A Smart ESC with IC5 connectors provides reliable electronic speed control. This 4S LiPo-capable system represents a significant step up in performance from brushed motors and lower-voltage platforms, making this brushless RC truck genuinely responsive and fast.
- Rugged Centre Differential — New to the ARRMA 4S BLX 4X4 platform, the centre differential represents a major engineering upgrade that delivers superior traction and handling characteristics. This three-differential all-wheel drive system ensures power is distributed intelligently to all four wheels, dramatically improving grip in corners and off-road conditions where traditional two-differential setups would lose traction.
- Heavy-Duty Composite Chassis with EXB Enhancement — The MOJAVE 4S features a strong, moulded composite chassis reinforced with EXB (EXtreme Bash) CVD front and rear driveshafts and EXB metal input and ring gears where the extra toughness is needed most. This engineering approach means your ready to run RC truck can handle genuine bashing without the fragility of lighter designs, and maintenance is simplified through ARRMA's signature modular design with easily removable chassis modules.
- Comprehensive Dirt and Rock Protection — Multiple layers of protection keep your investment safe during real-world use: wishbone dirt guards protect the suspension, a chassis dirt drain allows water and debris to escape, outdrive guards provide enhanced protection from rocks and impacts, and the inner body with scale details adds additional dirt protection for all internal surfaces. This multi-layered defence approach ensures the MOJAVE 4S can handle genuinely dirty off-road conditions.
- Spektrum 2.4GHz SLT3 Transmitter with Throttle Limiting — The included 3-channel Spektrum SLT3 radio system provides reliable 2.4GHz wireless control with an innovative throttle limiting feature that allows new drivers to set power delivery at 50% or 75% until they're ready for full speed potential. This thoughtful inclusion makes the brushless RC truck genuinely accessible for drivers progressing from slower bashers to more powerful setups.
- Waterproof Digital Servo with Metal Gears — The factory-installed Spektrum S652 metal-geared waterproof digital servo keeps steering responsive and reliable even when pushing through wet conditions or muddy terrain. The metal gear construction ensures durability under the loads imposed by genuine 50+ mph performance, whilst the waterproof design provides genuine protection for outdoor use.
- Oil-Filled Aluminium Shocks with Tall Shock Towers — Long-travel, oil-filled aluminium shocks mounted on tall shock towers provide genuine suspension travel and plush damping characteristics. Combined with wide suspension arms, silicone O-rings, adjustable turnbuckles, and front and rear swaybars for maximum stability, the suspension setup delivers impressive ride quality across varied terrain whilst maintaining predictable handling.
- Multi-Terrain Tyres with Vented Design — The dBoots FORTRESS LP multi-terrain tyres feature a vented design that improves traction by allowing air in and out whilst permitting water and dirt to escape, extending tyre life and maintaining grip in all track conditions. Mounted on tough multi-spoke wheels with CNC machined red anodised hubs and 17mm aluminium hexes, the tyre and wheel combination delivers aesthetic appeal alongside genuine performance.
- Scale Desert Truck Body with Interior Details — The finished body includes realistic front and rear bumpers for impact protection, a rear dirt deflector, scale skirt, protective grille, and a wheelie bar with rubber tyres for stunt potential. The inner body continues the scale theme with driver figures and interior details, proving that the MOJAVE 4S doesn't sacrifice visual appeal for performance.
- Rubber-Shielded Bearings Throughout — High-quality ball bearings with rubber shielding are used throughout the drivetrain and chassis, protecting against dirt ingress whilst maintaining smooth operation and durability even in dusty, wet conditions typical of genuine off-road use.
Technical Performance
The ARRMA 1/8 MOJAVE 4S 4X4 BLX represents a genuine step forward in brushless RC truck engineering. At 4.75 kg (10.49 lb) and measuring 638 mm long, 326 mm wide, and 242 mm high, the MOJAVE 4S offers a substantial chassis that feels robust in hand. The Spektrum Firma 3668 2400Kv four-pole brushless motor is a proven performer in the 4S LiPo category, delivering rapid acceleration whilst the 16-tooth pinion gear ratio paired with a 57-tooth spur gear provides an internal gear ratio of 2.85, tuned for genuine off-road performance. The waterproof Spektrum Firma 120A Smart ESC accepts both 3S and 4S LiPo battery configurations, meaning you can either run 2 x 2S packs or a single 3S or 4S hardcase pack (maximum dimensions 163 x 51 x 48mm, minimum specification 5000mAh 35C). With a 0.8MOD gear pitch and forward/brake/reverse drive type, the transmission is engineered for reliability under the loads imposed by brushless performance.
Performance-wise, the MOJAVE 4S is genuinely capable of 50+ mph under optimum conditions—genuine brushless speed that transforms the RC bashing experience. The three-differential all-wheel drive system with the new centre differential ensures power delivery is optimised across all four wheels, providing traction where other designs fail. Ground clearance of 37 mm (1.46 inches) and a 380 mm (14.96 inches) wheelbase combine to deliver impressive obstacle-clearing capability and stable handling characteristics. The independent double-wishbone suspension with oil-filled shocks, silicone O-rings, adjustable turnbuckles, and front and rear swaybars absorbs impacts effectively while maintaining responsive control. The IC5 connector type ensures compatibility with modern battery systems and chargers, simplifying your power setup. With 17mm aluminium wheel hexes, adjustable ride height, and comprehensive protection through wishbone dirt guards, chassis dirt drain, and outdrive protectors, the MOJAVE 4S is engineered for users serious about genuine off-road RC performance.
What's in the Box
- (1) ARRMA MOJAVE 1/8 4S BLX 4X4 Desert Truck RTR — fully assembled, painted and decalled, with all major components factory-installed
- (1) Spektrum SLT3 3-Channel 2.4GHz Transmitter — wireless controller with throttle limiting capability for new drivers
- (1) Spektrum SR315 DSMR 3-Channel Receiver — installed and ready to use, dual protocol compatible
- (1) Spektrum S652 Metal-Geared Waterproof Digital Servo — factory-installed, providing responsive steering
- (1) Spektrum Firma 3668 2400Kv Brushless Motor — factory-installed with ARRMA heatsink and cooling fan
- (1) Spektrum Firma 120A Smart Waterproof ESC — factory-installed with IC5 connectors (EC5 compatible)
- (4) AA Transmitter Batteries — ready for immediate use
- (1) Product Manual — multilingual instructions covering assembly, operation and maintenance
What You Need to Complete
- LiPo Battery Pack — either 2 x 2S, or 1 x 3S, or 1 x 4S hardcase configuration with EC5 or IC5 connector (5000mAh 35C minimum specification, maximum dimensions 163 x 51 x 48mm)
- Compatible Battery Charger — AC mains charger suitable for the LiPo configuration you choose
Frequently Asked Questions
- Is the ARRMA MOJAVE 4S suitable for beginners in the UK RC hobby? — The MOJAVE 4S is designed as a ready to run RTR model, meaning it arrives fully assembled and mostly ready to drive. However, it is classified as Skill Level 3, indicating it's suited to intermediate drivers rather than complete beginners. The included SLT3 transmitter features throttle limiting at 50% and 75%, allowing new drivers to progress gradually to full speed. If you're completely new to RC, you might consider a more forgiving platform first, but experienced bashers will find the MOJAVE 4S immediately accessible and enjoyable.
- What battery does the MOJAVE 4S BLX need, and how much does it cost to run? — The MOJAVE 4S is 4S LiPo-capable, meaning it can run either 2 x 2S packs or a single 3S or 4S hardcase battery pack. The minimum specification is 5000mAh 35C, and batteries must fit within maximum dimensions of 163 x 51 x 48mm with either EC5 or IC5 connectors. This flexibility is genuinely valuable—you can start with affordable 3S packs and upgrade to 4S later for additional performance. Running costs depend on battery price, which ranges from around £40-60 for quality 3S packs to £60-110 for 4S packs, though pricing varies by supplier.
- How fast does the MOJAVE 4S go, and what terrain can it handle? — The MOJAVE 4S is capable of 50+ mph under optimum conditions, making it a genuinely fast brushless RC truck. The multi-terrain dBoots FORTRESS LP tyres, comprehensive dirt protection, and oil-filled suspension mean it handles off-road, dirt, grass, parking lot, paved and asphalt surfaces with equal competence. The rugged centre differential and three-differential all-wheel drive system provide exceptional traction across varied terrain, making the MOJAVE 4S genuinely versatile rather than limited to single-surface use.
- What's the difference between the MOJAVE 4S and other ARRMA 4X4 trucks in the range? — The key innovation distinguishing the MOJAVE 4S is the introduction of the rugged centre differential to the ARRMA 4S BLX 4X4 platform, which delivers superior traction and handling compared to earlier two-differential designs. The desert truck body style with detailed cockpit, roll cage and roof rails offers genuine scale realism, whilst the comprehensive dirt protection system (wishbone guards, chassis drain, outdrive protectors, inner body) is specifically engineered for off-road use. The MOJAVE 4S represents the mature evolution of the platform with proven upgrades.
- Is the MOJAVE 4S waterproof, and can it handle wet conditions? — The MOJAVE 4S is water-resistant rather than fully waterproof. The Spektrum Firma 120A ESC and S652 servo are both waterproof components, and the comprehensive dirt and debris protection system (chassis dirt drain, wishbone guards, inner body protection) helps manage wet conditions. However, extended water crossings or submersion aren't recommended. The vented dBoots FORTRESS LP tyres actually benefit from moisture as it improves traction, and the rubber-shielded bearings throughout provide protection against wet conditions and mud.
- What maintenance does the MOJAVE 4S require? — ARRMA's modular chassis design with easily removable modules makes routine cleaning and repairs straightforward. After muddy use, rinsing the chassis (avoiding direct spray on electronics) and allowing it to dry thoroughly is sensible practice. The oil-filled shocks should be inspected periodically for seal condition, and the metal-geared servo and brushless motor are durable components requiring minimal maintenance. Regular bearing inspection and lubrication extends the life of the drivetrain. Spare parts are readily available through authorised ARRMA retailers in the UK.
- Does the MOJAVE 4S come with everything needed to drive it? — The MOJAVE 4S is RTR (ready to run) and arrives with the transmitter, receiver, motor, ESC and servo all factory-installed. However, you must provide a LiPo battery pack and charger to complete the setup—these are sold separately. The inclusion of four AA transmitter batteries means you can power the radio immediately, but without a charged LiPo battery, the truck itself won't run. Budget for a quality battery and charger in addition to the truck price.
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 MOJAVE 4S 4X4 BLX DT (with Centre Diff) RTR Blue C-ARA4404T2 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 Bumper Assembly
Front Assembly
Rear Assembly
Rear Bumper Assembly
Receiver Box Assembly
Chassis Assembly
Tranmission Assembly
Front and Rear Differential Assembly
Centre Differential Assembly
Shock Absorber Assembly
Roll Cage Assembly
Bodyshell / Cockpit / Wheels &Tyres
