ARRMA BIG ROCK 4X4 3S BLX Brushless 1/10th 4wd MT Black – ARA4312V3



SKU: 5052127038287 Category:

Available on back-order


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  • Stronger chassis and retained hinge pin plates
  • Steering with more clearance for stones
  • Castellated slipper pad and sliding gear mesh
  • 1.1 inch wider stance for better handling and bashing
  • Plastic locknut for slipper
  • 23T Spline servo saver
  • 37T 1.35Mod diffs with silicone O-rings
  • Power Module with sliding gear mesh and improved dirt
  • Rubber shielded bearings throughout
  • Oil-filled shocks with silicone O-rings
  • Wider arms front and rear
  • Body with matte black finish
  • Front and rear bumpers with matte black finish
  • Tough black multi-spoke wheels with matte black finish
  • Vented multi-terrain dBoots® RAGNAROK™ tyres
  • BLX100 2S/3S waterproof* ESC

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

  • IC5™ connectors (EC5™) compatible
  • Signature easy-access modular design
    • Easy-access power module
    • Easy-access electronics module
    • Easy-access diff module removal front and rear
  • Double wishbone suspension front and rear
  • Metal-geared differentials
  • Adjustable ride height
  • Adjustable body mounts
  • Adjustable turnbuckles
  • High-speed center driveshaft support
  • Wheelie Bar
  • 50+ MPH (80+ km/h) speed achievable in optimum driving
    conditions on 3S LiPo


A great step-up from brushed bashing, the 1/10 scale ARRMA®
BIG ROCK™ CREW CAB 4X4 3S BLX ready-to-run monster truck delivers a thrilling
combination of ARRMA® toughness, street truck style and 50+ mph speed
capability. Built on the powerful 4X4 BLX platform, its precision aluminium,
tough steel and composite materials come together for an easy-to-maintain,
super-durable vehicle design that’s now been upgraded to further increase the
monster truck’s impressive performance and durability.

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; longer suspension arms for a 1.10
inch increase in width; and rubber-shielded bearings throughout.

It also now includes a Spektrum™ SLT3™ transmitter and
SLR300 receiver. The transmitter is ergonomically designed for long periods of
fatigue-free bashing and has a foam wheel for precise fingertip control, plus an
improved hand grip and trigger feel. New bashers will be able to set throttle
limits at 50% or 75% until they are ready to use the full speed potential. The
SLT3™ is compatible with Tactic® SLT™ receivers to run other RTR vehicles you
may own, and includes a third channel to control optional features such as
lights and winches on models that have them.

ARRMA® now powers the BIG ROCK™ 4X4 3S BLX with a brushless
system featuring its BLX100 ESC and the Spektrum™ Firma™ 3200Kv brushless motor.
The combination provides incredible torque, acceleration and speed. The
transmission and chassis are ruggedly engineered to take full advantage of the
electronics’ power.

It has the ingenious modular design perfected by ARRMA®
engineers for easy component access and maintenance. The power module, with
improved dirt management, consists of the motor with ARRMA® heatsink and cooling
fan, plus motor plate, slipper clutch assembly and gear cover. The power module
can be detached from the chassis as a complete unit by removing just one screw.
With the power module removed, the slipper clutch can be reached easily for
adjustments by taking out three screws that attach the gear cover. The gear
ratio can be finely tuned as the power module now uses a sliding motor mesh

A two-piece moulding screwed to the truck’s chassis serves
as its electronics module, containing a waterproof receiver box, servo mount and
ESC tray. The SLR300 receiver mounts inside the receiver box for protection from
dirt and moisture. The ultra-compact ESC is screwed to the top of the module,
allowing quick access to the on/off switch, while the servo mounts to the side.
All three components can be removed together, quickly and easily.

The differential module houses each differential unit in an
innovative yoke design. Only eight screws need to be removed to release the
front and rear yokes. The power module can then be detached, allowing you to
pivot the gearbox cases for differential access. The BIG ROCK™ 4X4 3S BLX RTR
comes brushless-ready with 37T 1.35mod diffs with silicone O-rings. The large
gears can withstand huge torque, and internal metal gears have been chosen for
reliability during extreme bashing.

Its full-time 4WD transmission uses strong front, rear, and
center line telescopic driveshafts that can’t be lost during heavy impacts,
unlike dogbones. A simple, dependable, responsive steering assembly complements
the ultra-reliable drive system and features a servo horn with built-in servo
saver. The BIG ROCK™ 4X4 3S BLX RTR includes the waterproof Spektrum™ SPMS651
metal-geared digital servo for 15% more torque than the previous version’s
ADS-7M servo.

The self-bleeding, oil-filled shocks, now with silicone
O-rings, use a tried and tested, coil-over design for simple maintenance and
amazing handling. Their innovative rod-end has a moulded-in spring perch for
extra toughness. Extended height dirt defenders and a close-fitting body limit
the amount of dirt and debris that can get into the chassis tub. Front and rear
bumpers offer defense against impacts.

Accented by matte black front and rear bumpers and wheels,
the BIG ROCK™ 4X4 3S BLX truck’s long, scale Crew Cab body marks the epitome of
street style. With the included dBoots® RAGNAROK™ MT tyres, you’ll take it on
the run over dirt tracks, trails and even muddy courses. An adjustable wheelie
bar comes as standard, letting you enjoy a little stunt fun along the way.


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