Features

NEW for the ARRMA® BIG ROCK™ 4X4 3S BLX RTR:

  • 3-Channel SLT3 2.4GHz Spektrum radio and Spektrum SLR300 Waterproof* Receiver
    • Dual SLT protocol with fast response
    • Foam steering wheel surface
    • Ergonomic improvement for better grip and trigger feel
    • Improved wheel and trigger force
    • Third channel has 2-way thumb switch
    • Beginner throttle mode settings of 50% and 75%
    • Compatible with Tactic® SLT™ receivers
  • SPMS651 Spektrum metal geared waterproof digital servo outperforms its predecessor, the ADS-7M servo, with 15% more torque for improved steering control
  • 3660 3200Kv Spektrum Firma brushless motor with ARRMA heatsink and cooling fan, and, Safe D pinion
  • Stronger retained hinge pin plates and chassis
  • Higher steering clearance to avoid stones
  • Castellated sliding gear mesh and slipper pad
  • Slipper has a plastic locknut
  • Servo saver is 23T Spline
  • 1.35Mods 37T diffs with silicone O-rings
  • Sliding gear mesh equipped to power model for improved dirt management
  • Bearings throughout are rubber shielded
  • Shocks are oil-filled with silicone O-rings
  • Bumpers at front and rear
  • Multi-terrain vented dBoots Fortress MT tyres with hardened gunmetal coloured multi-spoke wheels

Product Information

New Arrma BIG ROCK with more scale realism and power

Speed and power head the long list of attributes for the ARRMA® BIG ROCK™ 4X4 3S BLX Monster Truck. Throw in tough steel, precision aluminium and composite materials and you have one of the fastest track bashers that’s as tough as nails with a performance to match.

The internals on the ARRMA® BIG ROCK™ 4X4 3S BLX Monster Truck are also tough with retained hinge pin plates and a stronger chassis, higher clearance on the steering to avoid stones, sliding gear mesh and a castellated slipper pad, and, the bearings are rubber shielded throughout the vehicle.

Included in this package are the Spektrum SLT3 radio system and an SLR300 receiver. The ergonomic design put into this transmitter by Spektrum ensures you can race the ARRMA® BIG ROCK™ 4X4 3S BLX Monster Truck for longer periods without fatiguing. The design of the handle, trigger, and, foam covered steering wheel all add to ease of use and precise control. If you’re just starting out the SLT3 has throttle limit settings so you can pace yourself with 50% or 75% until you think you’re ready to handle 100% of this track bashing RC Monster Truck. The SLT3 transmitter is also compatible with Tactic SLT receivers so if you have any installed elsewhere in your RC garage they will also bind and run. A third channel on the SLT3 also enables you to operate lights, winches etc on the models that have them.

Powering the ARRMA® BIG ROCK™ 4X4 3S BLX Monster Truck is a brushless system with a Spektrum 3200Kv Firma brushless motor, and, a BLX100 ESC. This ESC/motor combination pumps out amazing acceleration, speed and torque and the chassis and transmission are engineered to handle the immense power that is generated.

Less time on the bench, more time bashing

ARRMA engineers have perfected an ingenious modular design that gives you easy access for component changeover and maintenance. The power module can be detached from the chassis by removing just one screw and contains the motor with ARRMA cooling fan and heatsink, slipper clutch assembly, gear cover and motor plate. All of this is protected with improved dirt management measures. Once the power module is removed you can easily reach the slipper clutch with the removal of three screws and tune the gear ratio on the ARRMA® BIG ROCK™ 4X4 3S BLX Monster Truck as the power module utilises a sliding motor mesh design.

The electronics module is a two-piece moulding screwed to the chassis that contains a waterproof receiver box, ESC tray and servo mount. To protect it from dirt and moisture the SLR300 RX is mounted inside the receiver box. Screwed to the top of the module is the super-compact ESC that allows easy access to the On/Off switch. The servo mounts to the side of this and all three components can be removed as one in a quick and easy manner.

Each differential unit sits inside the diff module utilising an innovative yoke design. You can release the front and rear yokes by removing only eight screws. Once that is done you can detach the power module and then swivel the gearbox cases for differential access. The 37T 1.35 mod diffs are brushless ready with silicone O-rings and the large gears are able to handle the massive torque while the internal metal gears are fitted specifically to handle extreme punishment.

An RC Monster Truck that is the epitome of street style

The ARRMA® BIG ROCK™ Monster Truck features full-time 4WD transmission with telescopic driveshafts used on the front, centre and rear. The Spektrum SPMS651 metal geared digital servo is not only waterproof but provides 15% more torque than it’s predecessor, the ADS-7M servo.

The oil-filled, self bleeding shocks on this RC Monster Truck now feature silicone O-rings on a proven coil-over design giving you superb handling and being easy to maintain. The close-fitting body and extended height dirt defenders limit the amount of debris reaching the chassis tub while the front and rear bumpers soften the impact of any crashes.

The included dBoots® RAGNAROK™ MT tyres will dominate any terrain you take on including dirt tracks, trails and even muddy courses. Enjoy performing stunts with the adjustable wheelie bar on the back. All the while you'll be doing it in style, with the ARRMA® BIG ROCK™ truck's long, scale Crew Cab style body with matte black front and rear bumpers. 

What’s in the Box?

  • ARRMA® BIG ROCK™ 4X4 3S BLX 1/10 Scale 4WD Electric Monster Truck RTR

  • BLX100 2S/3S Waterproof* ESC

  • Spektrum™ Firma™ 3660 3200Kv Brushless Motor

  • Spektrum™ 2.4GHz SLT3™ 3-Channel Transmitter

  • Spektrum™ SLR300 Receiver

  • Spektrum™ SPMS651 Waterproof* Metal-Geared Digital Servo

* Note: For details on waterproof standards, refer to the instruction manual

SKU ARA4312V3B
Barcode # 5052127043830
Brand ARRMA

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