Arrma Big Rock 1/10 4WD Electric Monster Truck


Arrma Big Rock 1/10 4WD Electric Monster Truck

Product no.: Ara4312v3

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Delivery weight: 18 kg
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50+mph / 80+km/h






Mid Motor




Monster Truck




514mm / 20.24"


327mm / 12.87"


55mm / 2.17"


351mm / 13.82"


356mm / 14.02"


201mm / 7.91"




2.84kg / 6lbs 4oz


2S or 3S Lipo (Hardcase only) within dimensions 165 x 51 x 48mm / 6.5 x 2.01 x 1.89 inches


2 Year Limited

The BIG ROCK 4X4 3S BLX is DESIGNED FAST, DESIGNED TOUGH — built for exciting bashing speeds and extreme, all-terrain durability. New features that enhance its unstoppable performance include a stronger chassis and retained hinge pin plates; steering with more clearance for stones; a castellated slipper pad and sliding gear mesh; and rubber-shielded bearings throughout.

The BIG ROCK CREW CAB 4X4 3S BLX will provide unrivalled traction on any surface, blasting through your chosen environment, as you carve away the landscape with the ground-thrashing motion of full-time 4WD.

Longer suspension arms feature on the V3 version of this model, giving a wider stance that improves handling with increased cornering stability.

The BIG ROCK CREW CAB 4X4 3S BLX features an RC Crew Cab truck body shell with pounds of scaler realism. The mean street presence of the BIG ROCK CREW CAB is amplified by matte black wheels and bumpers.

High-sides on the molded composite bathtub chassis ensure the amount of dirt and debris entering the chassis is kept to a minimum.

High-strength hook-and-loop straps are used to keep your batteries in place, whatever the action entails.

The dual bell crank steering has been redesigned with extra clearance to prevent stones or debris jamming the steering mechanism during your bashing session.

Featuring full-time four-wheel drive, the BIG ROCK CREW CAB 4X4 3S BLX is ready to blast through your chosen environment. Telescopic driveshafts in the front, rear and centerline transmit drive from the slipper clutch to each wheel.

Heavy duty tough molded differential and input gears make the vehicle ready for the brutal BLX power.

Steel spline inserts are molded into the input gears for maximum strength and minimum hassle.

Soaking-up a wide range of surfaces is made easy with the included coil-over oil shocks. Factory set to handle everything from fast speed runs to snow and mud chucking, no matter where you choose to bash, these high-quality units will keep you stable and in-control.

The shock absorbers on the BIG ROCK CREW CAB 4X4 3S BLX feature a silicone O-rings, keyed spring perches and a self-bleed design. These shocks are designed to be simple to maintain yet offer all the performance required to give amazing handling.

The tough molded composite chassis has been enhanced, adding extra strengthening reinforcement and retained aluminum suspension hangars for maximum durability.

The updated Power Module features a larger pull-tab and improved sealing, protecting the rotating parts within from the elements.

An easy-access Power Module assembly can be removed from the vehicle in seconds, with the removal of just one screw. The center shaft assembly is telescopic to assist with easy disassembly and is sprung-loaded to ensure it stays in position during use.

With the Power Module removed from the vehicle the slipper clutch can be accessed with the removal of three screws. The triple pad slipper clutch in the 3S models features a 0.8 module tooth spur gear making it extremely durable in all conditions.

The 57T 0.8 module spur gear features the proven castellated slipper pads and a plastic locknut for even more tunability and durability.

A sliding gear mesh allows you to fine-tune the gearing of your vehicle to your specific requirements and bashing areas.


Both the front and rear diff modules are easy to access in the BIG ROCK CREW CAB 4X4 3S BLX, ensuring that you spend more time bashing and less time in the workshop.

These differentials are TOUGH. The main differential gears have been super-sized with large pitch gears that have been designed to withstand huge torques, allowing lightweight composite material to be used for reduced rotating mass without compromising strength.

The differential internals feature silicone O-rings and full-metal, straight-cut gears, ensuring trouble-free operation.

A full complement of rubber shield bearings is included. The rubber shields help keep dirt out of the bearings for a more durable and highly efficient drivetrain.

Easy-access Electronics Module assembly can be removed from the vehicle with the removal of only five screws. The module offers quick and easy access to the servo, electronic speed controller and receiver.

The two-piece molding comprises a lower box and upper lid that are sealed with high-quality rubber seals. The ESC and steering servo are attached to this molding, whilst the receiver sits inside the waterproof box.

With awesome 3S BLX power and superb traction from the vented dBoots RAGNAROK MT tires, the BIG ROCK CREW CAB 4X4 3S BLX wheelies for fun. To try and tame the beast ARRMA have installed a wheelie bar as standard.

The BLX100 100A waterproof ESC provides consistent power control and is 3S LiPo ready.

Fitted with a reliable IC5 battery connector and sporting a built-in cooling fan for reduced heat during intense driving action, the BLX100 ESC has over-voltage protection, and a two-stage LiPo cut-off for added cell management.

The fitted 12AWG high-quality wires and 6.0V BEC unit are combined with a three-mode throttle profile (FWD/REVERSE/BRAKE) to provide the ultimate driving experience.

Recommended battery specification: 5000mAh - 35C minimum

The SPEKTRUM 3660 3200kV brushless motor delivers both speed and torque and is perfectly balanced for use with the BLX100 ESC unit and 3S LiPo batteries.

A beautifully etched black aluminum motor can provides a premium look, whilst a four-pole internal configuration keeps the power supply smooth and consistent.

SAFE-D5 Pinions are present and add an extra level of security to your drivetrain.

Gold bullet connectors allow fast and easy wire removal when you need to clean your vehicle.

An aluminum motor heatsink is fitted to the 3660 motor, as standard. The heatsink features large fins and a flat area that has been designed to work with the fan for improved cooling in extreme bash sessions.

Finished in a matte black color, the heatsink is etched with a cool ARRMA logo.

The Spektrum S651 Steering Servo will provide fast and consistent steering response on the most demanding surfaces.

A waterproof servo case will keep your ARRMA vehicle handling correctly, even when the action gets wet.

With 7.27kg (101oz) of torque at 6v, this Spektrum S651 Steering Servo can reach full operating angle in just 0.14 seconds.

The Spektrum SLT3 radio system offers fast and consistent control for your ARRMA vehicle. Using 2.4Ghz SLT technology, your ARRMA vehicle is controlled by an ergonomic wheel and trigger style radio transmitter.

Ideal for new RC users and experienced bashing fans alike. Adjustable steering and throttle trim will allow you to easily tune your control experience to suit your individual needs.

The SLT3 transmitter is compatible with Tactic receivers.

IC5 connectors can handle the power required when the action gets furious. They provide a reliable connection between your ESC and your chosen battery packs.

Fully waterproof ESC, steering servo and radio receiver box are standard. This means that hitting the roughest terrains, in the most extreme conditions, will be no problem. Rain, mud, snow, dirt and anything else you want to bash your way through.

The included waterproof electronics are ready for action.

* For details on waterproof standards, please refer to the product instruction manuals

Designed to be FAST, designed to be TOUGH. ARRMA want to provide our customers with an unforgettable RC experience that will blow you away.

Just add a 3S LiPo battery to your model and you are ready to blast past speeds of 50mph. No additional parts required!

A high-quality 2.4Ghz radio transmitter and receiver, wheels and high-performance dBoots tires, waterproof ESC and steering servo and a pre-painted bodyshell are all included, as standard.

Please check the vehicle specifications for exact details of what is included in the box and what is required to get your ARRMA vehicle running.

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