Arrma Granite Grom 4x4 RTR 1/18 Brushed Monster Truck

ARRMA Granite Grom 4×4 RTR 1/18 Brushed Monster Truck (ARA2102)

The ARRMA Granite Grom 4×4 is a 1/18 RTR monster truck designed for pure fun anywhere: garden, park or light off-road areas. It comes ready to run with battery and charger included, a protected 4×4 transmission and waterproof electronics. Available in three colours: blue, red and green.

Main features

• Integrated electronics: Waterproof Spektrum SLT™ 2-in-1 25A ESC/receiver + ARRMA MEGA 380 28T brushed motor.
• Radio: Spektrum SLT2 2.4 GHz (2-channel), with selectable throttle modes for beginners.
• Servo: Spektrum SX110 metal-geared and sealed for off-road running.
• Drivetrain: 4×4 with protected geartrain and a strong composite chassis.
• Battery & charger included: Spektrum Smart 2S 7.4V 1400 mAh LiPo (IC2) + Spektrum S10 Smart G2 USB-C charger.
• Bodywork: factory-finished shell with quick-access system, plus impact-absorbing front and rear bumpers.

Handling & performance

Compact, durable and easy to control. The independent suspension with coil-over shocks and the 4×4 transmission offer predictable grip on dirt, grass or gravel. Its 1/18 size makes it perfect for small spaces, with minimal maintenance and widely available spare parts.

Technical specifications

What's included?

• ARRMA Granite Grom 4×4 RTR monster truck fully assembled.
• Electronics installed: Spektrum SLT 2-in-1 25A ESC/receiver, MEGA 380 28T motor and SX110 servo.
• Spektrum SLT2 2.4 GHz transmitter.
• Spektrum Smart 2S 7.4V 1400 mAh LiPo (IC2) and Spektrum S10 Smart G2 USB-C charger.
• 4× AA batteries for the transmitter.
• User manual.

What do you need to run it?

RTR (ready to run): all you need is a USB power adapter supporting QC 2.0/3.0 18W+ for the USB-C charger. The LiPo battery and AA cells are included.

FAQ

How long does the battery last?

Expect 10–20 minutes depending on terrain and driving style.

Is it suitable for beginners?

Yes. Thanks to its compact size, progressive controls and sealed electronics, it's a great entry-level off-road model.

Are spare parts and upgrades available?

Yes. ARRMA provides spare parts and optional upgrades for drivetrain, suspension and steering.