Arrma Granite Grom


WIN this Brand New release from Arrma, the much anticipated Granite Grom!!

This 1/18 Scale Ready To Run Monster Truck Basher could be yours today in this weeks FLASH DRAW!!

Competition Finished

Winners are

Username Ticket Number Gift Products Label Chosen Label
Jonathan Farr 25 Mouse

WIN this Brand New release from Arrma, the much anticipated Granite Grom!!

This 1/18 Scale Ready To Run Monster Truck Basher could be yours today in this weeks FLASH DRAW!!

Amped-up ARRMA® RC blasting gets “fun-sized” with the fast, tough, and ready-to-run GRANITE™ GROM 4X4 Monster Truck. At 1/18 scale, it’s small enough to take along anywhere. And the GRANITE GROM delivers a big dose of genuine ARRMA performance and durability whenever you get the urge to bash.

Enjoy some after-school RC monster truck action with friends. Sneak in a little bashing during your office lunch break. Whether you’re a young beginner or an experienced RC basher, the GRANITE GROM easily fits time for ARRMA RC bashing into your way of life. It’s tough, fast — and conveniently small.

Unlike many manufacturers of mini RC models, ARRMA made no compromises when shrinking this basher down to small scale size. The GRANITE GROM 4X4 Monster Truck is precision-engineered to the same high standards as larger ARRMA RC vehicles. It also has a clipless body mount design that keeps the body securely attached but easy to remove for all drivers, young and old. Among small scale RC basher models it’s in a league of its own, with convenience plus the power, strength, and handling capabilities you need to get serious about your stunts.

The ARRMA GRANITE GROM 4X4 Monster Truck endures any punishment you can dish out. Impact-absorbing front and rear bumpers are the bash-ready bookends to its strong composite chassis. A 4WD transmission with robust metal gears carries power from the MEGA 380 brushed motor through an enclosed drivetrain to the tough dBoots® FORTRESS™ monster truck wheels and tires. Even the Spektrum™ SX110 steering servo has metal gears — and, like the IC2® connector-equipped Spektrum SLT™ 2-in-1 25A ESC and receiver, it’s waterproof for carefree bashing in any conditions.

If you’re a first-time RC basher, the Spektrum 2.4GHz SLT2™ transmitter helps you learn control skills safely by limiting the monster truck’s maximum speed to 50% or 75% until you’re ready to handle it all. Recharging the included Spektrum Smart 2S LiPo battery is also worry-free. Just plug it into the supplied Spektrum S10 Smart G2 Mini 2S USB-C Charger with the attached IC2 connectors. Smart technology instantly takes care of the rest. In about an hour, your battery is safely recharged and ready for another round of fun.

Everything you’ll need to the run the GRANITE GROM comes in the box. The truck body is professionally factory-finished in your choice of three brilliant, durable color schemes. GRANITE GROM upgrade parts are available for cranking up its capabilities past eleven. They include a Metal Axle & Wheel Hub Set, Aluminum Shock Set, Adjustable Steering Links, and a two-piece, assembled Oil-Filled Differential Set.

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

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.

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.


  • Awesome monster truck styling with three color 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 tires
  • 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
  • 2-Year limited warranty (see website for details)

In The Box

  • (1) 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
  • (4) AA Transmitter Batteries
  • (1) GRANITE™ GROM 4X4 Monster Truck Product Manual

Needed to Complete

  • (1) USB power adapter with QC 2.0/3.0 18W+
Product Specifications
  • Battery Max Dimensions: 101x31x21mm
  • Approximate Assembly Time Less than 1 Hour
  • Body Pre-painted, Decaled
  • Brakes Integral with ESC
  • Pinion 16T
  • Scale 1/18
  • Motor Type Brushed
  • Speed Control Included
  • Wheelbase 6.5″ (165 mm)
  • Charger Included
  • Receiver Included
  • Shock Type Oil-Filled, Coil-Over Springs
  • Ball Bearings Rubber-shielded Bearings
  • Chassis Composite
  • Completion Level Ready-To-Run
  • Drivetrain 4WD
  • Drive Type Forward/Brake/Reverse
  • Battery Included
  • Connector Type IC2
  • Motor Size 380 28T
  • Product Length 9.84″ (250 mm)
  • Spur Gear 59T
  • Suspension Independent
  • Product Height 4.65″ (118 mm)
  • Top Speed 20+
  • Power System MEGA
  • Product Width 7.87″ (200 mm)
  • Radio Included
  • Technology SLT Protocol
  • Power Type Electric
  • Gear Pitch 0.5MOD
  • Servos Included
  • Product Weight 1.77lb (800g) with Battery
  • Tire Tread dBoots® FORTRESS™
  • Vehicle Type Monster Truck
  • Water-Resistant Yes


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