Skip to content

Next Dispatch:

Australia's Ultimate Hobby & RC Shop.

ARRMA

ARRMA Granite Grom 4x4 RC Monster Truck Electric 4WD 1/18 Scale RTR - Green

  • 1/18
  • 4WD
  • RTR
  • Brushed

Part no. ARA2102T3

Sold out4.0
3 reviews
1 / 15
1 / 15

Videos

Now $159.99was $229.99 You Save $70.00

Sale now on

or 4 fortnightly payments of $40.00 with afterpay or PayPal, or zip

Add it to My Garage

ARRMA Granite Grom 4X4: fun-sized 1/18 monster truck with metal-geared 4WD, Spektrum 2S LiPo and charger included, and a speed-limiting transmitter

  • Fun-sized 1/18 scale engineered to the same standards as larger ARRMA vehicles
  • 4WD transmission with tough metal gears and enclosed drivetrain
  • Spektrum SLT2 2.4GHz transmitter with 50% and 75% speed limiting for beginners
  • Spektrum Smart 7.4V 1400mAh 2S LiPo battery and USB-C charger included
  • Clip-free body attachment — press to release, snap to secure
Select Option: Green

Ordered 26 Oct · we're waiting on our supplier

Part Support

Replacement & upgrade parts that fit this model

Videos

Overview

The included Charger requires a USB Fast Charger adaptor to operate. We recommend using a USB Fast Charger adaptor with a QC 2.0/3.0 18W+ output.

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 the same high standards as 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 is available in three colour schemes, and upgrade parts are available to enhance its capabilities.

Note

The included Charger requires a USB Fast Charger adaptor to operate. We recommend using a USB Fast Charger adaptor with a QC 2.0/3.0 18W+ output. For details on waterproof standards, please refer to the product instruction manual.

Features

  • Awesome monster truck styling with three colour choices
  • Powerful Spektrum 2S LiPo battery & safe, easy-to-use charger
  • Easy clip-free 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 dBoots® FORTRESS™ monster truck wheels and tyres
  • Impact-absorbing front and rear bumpers
  • Spektrum SLT2 2-channel 2.4GHz radio
  • Spektrum SLT 2-in-1 25A waterproof ESC and receiver
  • Genuine ARRMA Product

In the box

  • 1x GRANITE™ GROM 4X4 Monster Truck RTR
  • 1x Spektrum™ Waterproof SLT™ 2-in-1 25A ESC & Receiver
  • 1x ARRMA MEGA 380 28T Brushed Motor
  • 1x Spektrum 2.4GHz SLT2™ Transmitter
  • 1x Spektrum SX110 Waterproof Metal-Geared Servo
  • 1x Spektrum Smart 7.4V 1400mAh 2S 30C Hard Case LiPo Battery
  • 1x Spektrum S10 Smart G2 Mini 2S USB-C Charger
  • 4x AA Transmitter Batteries
  • 1x GRANITE™ GROM 4X4 Monster Truck Product Manual

You'll need

  • 1x USB Fast Charge Power Adapter (QC 2.0/3.0 18W+ output)

Highlights

Bash-Anywhere Small Scale Size

Bash-Anywhere Small Scale Size

The ARRMA GRANITE GROM 4X4 Monster Truck RTR packs all the durability and performance you've come to expect from ARRMA, just in a more compact package! Get ready for big fun in a small, mighty machine.

Awesome Monster Truck Looks

Awesome Monster Truck Looks

The ARRMA GRANITE GROM 4X4 Monster Truck RTR comes ready to roll with a professionally factory-finished body in your choice of three eye-catching, long-lasting colour schemes. Its tough dBoots® FORTRESS™ monster truck wheels and tyres provide aggressive looks and unstoppable traction on any terrain. It's big fun in a small, stylish package!

Clip-Free Body Attachment

Clip-Free Body Attachment

The GRANITE GROM monster truck body effortlessly snaps onto the chassis, securing it quickly and safely. Removing it is just as easy, with a simple press-and-release action. No fiddly clips to wrestle with – this body attachment system is designed for everyone, regardless of age or experience.

Tough Metal Gears

Tough Metal Gears

Bash without worries in any weather with the ARRMA GRANITE GROM monster truck! Its all-metal geared transmission is built to last, and even the installed Spektrum SX110 waterproof steering servo features tough metal gears for extra resilience. No matter the conditions, this truck is ready for action!

Rugged 4-Wheel Drive Transmission

Rugged 4-Wheel Drive Transmission

The GRANITE GROM's rugged 4-wheel drive transmission, equipped with tough metal gears, ensures maximum traction on any surface. Power from the installed MEGA 380 brushed motor is efficiently transferred to the wheels through a fully enclosed drivetrain, shielding the entire power system from the elements and ensuring reliable performance, no matter where your adventures take you.

Fast, Safe Battery Charging

Fast, Safe Battery Charging

Fuel your fun with the included Spektrum Smart 2S LiPo battery featuring IC2 connectors, delivering extended run times for uninterrupted action. When it's time for a recharge, simply connect it to the handy Spektrum Smart G2 S10 USB-C Charger. Enjoy safe, automatic charging that gets you back in the driver's seat in about an hour

Easy-To-Use Spektrum 2.4Ghz SLT2 Transmitter

Easy-To-Use Spektrum 2.4Ghz SLT2 Transmitter

The included Spektrum SLT2 2-channel transmitter, perfectly sized for all drivers, ensures a comfortable grip for hours of fun. It even helps you learn the ropes with adjustable speed limits (50% or 75%), building your confidence before unleashing full throttle. Plus, it comes with four AA batteries, so you're ready to roll right out of the box!

Specifications

Length250mm (9.84in)
Width200mm (7.87in)
Height118mm (4.65in)
Wheelbase165mm (6.5in)
Weight800g (1.77lb) with battery
Tyre Diameter70mm (2.75in)
ChassisMonster Truck
Drivetrain4WD
Gear Ratio3.688:1
SuspensionOil-Filled Coil-over Shocks
MotorBrushed 380 28T
ESCSLT™ 2-in-1 25A ESC

RC Car

Scale1/18
Max LiPo Power2S (7.4v)
CompletionReady to Run
Skill LevelBeginner, Intermediate, Experienced
Power SourceElectric Brushed
Chassis TypeMonster Truck
On/Off RoadOff Road
Drivetrain4WD

Factory Specs

Battery ConnectorIC2
Front Shock Oil300cSt
Rear Shock Oil300cSt
Pinion Gear16T 48dp/0.5Mod
Spur Gear59T 48dp/0.5Mod
Wheel Hex Size12mm

Parts

Top parts for this ARRMA Granite Grom 4x4 RC Monster Truck Electric 4WD 1/18 Scale RTR - Green

Shop all parts

Manuals

Reviews (3)

4.0

Based on 3 reviews

  • 5 stars1
  • 4 stars1
  • 3 stars1
  • 2 stars0
  • 1 star0
  • Antony J

    Verified buyer

    21 July 2026

  • Raymond Q

    Verified buyer

    23 Aug 2025

  • Daniel B

    Verified buyer

    2 May 2025

Questions & Answers

Have a question, or an answer? Our team and other owners both reply.

No questions yet. Ask the first one.