ARRMA 1/18 Granite Grom Mega 380 4WD Electric RTR RC Monster Truck - Blue

Brand: ARRMA | SKU: ARA2102T1
3 in stock


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The GRANITE™ GROM 4X4 Monster Truck by ARRMA® is a fun-sized, tough, and ready-to-run RC vehicle. It’s small, durable, and perfect for bashing anywhere, anytime. Whether you’re a beginner or experienced, it fits into your lifestyle. It’s engineered to high standards like larger ARRMA vehicles and has a clipless body mount design for easy removal.

The ARRMA GRANITE GROM 4X4 Monster Truck withstands any punishment. It has impact-absorbing bumpers and a strong composite chassis. Its 4WD transmission with metal gears powers the MEGA 380 brushed motor. The Spektrum™ SX110 steering servo is waterproof, like the IC2® connector-equipped Spektrum SLT™ 2-in-1 25A ESC and receiver. The Spektrum 2.4GHz SLT2™ transmitter helps beginners learn control skills by limiting the truck’s speed. Recharging the included battery is easy with the supplied charger. The truck body comes in three-colour schemes, and upgrade parts are available to enhance its capabilities.

Take advantage of small scale value and versatility with the GRANITE GROM 4X4 Monster Truck RTR, and experience ARRMA RC bashing excellence for yourself.


Key Features
Bash-Anywhere Small Scale Size

The ARRMA GRANITE GROM 4X4 Monster Truck RTR is engineered and manufactured to the same high standards of durability and performance that you expect from any ARRMA vehicle. It's just smaller!

Awesome Monster Truck Looks

Right out of the box, the monster truck body comes professionally factory-finished in your choice of three brilliant, durable colour schemes. Tough dBoots® FORTRESS™ monster truck wheels and tyres add powerful looks and all-terrain traction.

Clip-Free Body Attachment

The GRANITE GROM monster truck body snaps onto the chassis easily, quickly, and securely. It comes off with a simple press-and-release. With no tiny clips to force into place, it's a body attachment system that all ages can successfully manage.

Tough Metal Gears

Enjoy carefree bashing with your ARRMA GRANITE GROM monster truck in any conditions. The transmission is fully metal geared for durability. Even the installed Spektrum SX110 waterproof steering servo has tough metal gears.

Rugged 4-Wheel Drive Transmission

The high-traction 4-wheel drive transmission features rugged metal gears. It carries power from the installed MEGA 380 brushed motor to the wheels through an enclosed drivetrain. The entire power system is well-protected for dependable performance on all terrain.

Fast, Safe Battery Charging

The Spektrum Smart 2S LiPo battery with IC2 connectors provides the power for long run times. When it's time to recharge, just plug it into the convenient Spektrum Smart G2 S10 USB-C Charger. Safe charging begins automatically and only takes about an hour.

Easy-To-Use Spektrum 2.4Ghz SLT2 Transmitter

The high-quality Spektrum SLT2 2-channel transmitter is the perfect size for all drivers. It can help you learn control skills safely by limiting the monster truck's maximum speed to 50% or 75% until you're ready for it all. Four AA batteries included.

  • Awesome monster truck styling with three colour choices
  • Powerful Spektrum 2S LiPo battery & safe, easy-to-use charger
  • Easy body attachment and removal
  • Enclosed drivetrain for all-terrain protection
  • Reliable, high-quality hex hardware
  • Durable composite chassis
  • High-traction 4WD transmission
  • Tough metal gears
  • Independent suspension and oil-filled, coil-over shocks
  • Tough monster truck wheels and tyres
  • Impact-absorbing front and rear bumper
  • Spektrum SLT2 2-channel 2.4GHz radio
  • Spektrum SLT 2-in-1 25A waterproof ESC and receiver*
  • Spektrum SX110 waterproof metal-geared servo*

  • Length: 250 mm (9.84")
  • Width: 200 mm (7.87")
  • Height: 118 mm (4.65")
  • Wheelbase: 165 mm (6.5")
  • Weight: Product Weight: 800g (1.77lb) w/ Battery
  • Tread F/R: dBoots® FORTRESS™
  • Tyre Width/Diameter F/R: N/A
  • Chassis: Monster Truck
  • Drivetrain: 4WD
  • Gears: Metal
  • Suspension: Oil-Filled Coil-over Shocks
  • Motor: Brushed 380 28T
  • ESC: SLT™ 2-in-1 25A ESC

Included items
Description QTY
GRANITE™ GROM 4X4 Monster Truck RTR 1
Spektrum™ Waterproof SLT™ 2-in-1 25A ESC & Receiver 1
ARRMA MEGA 380 28T Brushed Motor 1
Spektrum 2.4GHz SLT2™ Transmitter 1
Spektrum SX110 Waterproof Metal-Geared Servo 1
Spektrum Smart 7.4V 1400mAh 2S 30C Hard Case LiPo Battery 1
Spektrum S10 Smart G2 Mini 2S USB-C Charger 1
AA Transmitter Batteries 4
GRANITE™ GROM 4X4 Monster Truck Product Manual 1
Required items (not included)
  • 1x USB Fast Charge Power Adapter w/ QC 2.0/3.0 18W+
  • For details on waterproof standards, please refer to the product instruction manuals.
Assembly Type: Ready to Run
Max LiPo Power: 2S (7.4v)
Size (Scale): 1/18
Skill Level: Beginner
Power Source: Electric Brushed
Chassis Type: Monster Truck
On/Off Road: Off Road
Drivetrain: 4WD
Factory specs
Max LiPo power:
Battery connector:
Front shock oil:
Rear shock oil: 300cSt
Front differential oil:
Centre differential oil:
Rear differential oil:
Pinion gear: 16T 48dp/0.5Mod
Spur gear: 59T 48dp/0.5Mod
Wheel hex size:
ARRMA 1/18 Granite Grom Mega 380 4WD Electric RTR RC Monster Truck - Blue
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