SKU: 57452948511

ARRMA 1/18 GRANITE GROM MEGA 380 Brushed 4X4 Monster Truck RTR with Battery & Charger, Blue

Sale price$134.99 Regular price$149.99
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Description

ARRMA 1/18 GRANITE GROM MEGA 380 Brushed 4X4 Monster Truck RTR with Battery & Charger, BlueARRMA 1 18 GRANITE GROM MEGA 380 Brushed 4X4 Monster Truck RTR with Battery & Charger, Blue Features 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

  • ARRMA 1/18 GRANITE GROM MEGA 380 Brushed 4X4 Monster Truck RTR with Battery & Charger, Blue
  • Features

    • 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)

    Overview

    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.

    Video Overview

     

    Under The Hood

     

     
    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 color schemes. Tough dBoots® FORTRESS monster truck wheels and tires 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.

     

    *For details on waterproof standards, please refer to the product instruction manuals.

    Product Specifications

    Manufacturer # 660132924553
    Power Type Electric
    Gear Pitch 0.5MOD
    Servos Included
    Charger Included
    Receiver Included
    Shock Type Oil-Filled, Coil-Over Springs
    Battery Included
    Connector Type IC2
    Motor Size 380 28T
    Product Length 9.84" (250 mm)
    Spur Gear 59T
    Suspension Independent
    Motor Type Brushed
    Speed Control Included
    Wheelbase 6.5" (165 mm)
    Power System MEGA
    Product Width 7.87" (200 mm)
    Radio Included
    Technology SLT Protocol
    Product Weight 1.77lb (800g) with Battery
    Tire Tread dBoots® FORTRESS™
    Vehicle Type Monster Truck
    Water-Resistant Yes
    Ball Bearings Rubber-shielded Bearings
    Chassis Composite
    Completion Level Ready-To-Run
    Drivetrain 4WD
    Drive Type Forward/Brake/Reverse
    Product Height 4.65" (118 mm)
    Top Speed 20+
    Approximate Assembly Time Less than 1 Hour
    Body Pre-painted, Decaled
    Brakes Integral with ESC
    Pinion 16T
    Scale 1/18
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57452948511

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4.3 ★★★★★
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Verified Purchase
Recon
Birmingham, US
★★★★★ 4
Rattles like a vibrator when it mops after about 2 weeks.
Size: C20 renewed
Works ok. Vacuum beater and opening is only about 6 inches long and the dirt box in the bot is really tiny. Beater is way to tiny to do any real vacuuming on even short shag rugs. The mop works but basically just evenly spreads out whatever dirt is on the floor, evenly across your entire floor and sands the floor with it. After about 2 weeks the bot starts rattling REALLY loud and vibrating like its falling apart. The crazy loud rattling noise is coming from the plastic mop pad axles when they spin. The vacuum bag inside the base is very good quality, but small and not reusable. I cut the far end of the bag down the middle and glued on some velcro strips to each side to re-close it, which allows me to empty the bag and then close it back up again. Pretty sure this thing transmits everything it sees/does back to China.
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Reviewed in the United States on April 30, 2026
C
Verified Purchase
Crystal
Carnegie, US
★★★★★ 1
Issues
Size: C20 renewed
Spent all this money for it to consistently have problems. It doesn’t even mop anymore because it keeps saying there is a problem with the sewage tank. I’ve only turned it on less than 5 times and it’s already having issues. Can’t even get it to mop anymore
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Reviewed in the United States on April 25, 2026
M
Verified Purchase
Melace83
Phoenix, US
★★★★★ 5
Works great
Size: C20 renewed
I saved some money by purchasing this certified like new. Worked well out of the box, but there was an issue with it and the people that do in fact check to ensure these work should do a better job. The issue was with the water and emptying it into the dirty tank. Just kept giving me an error. So, I had to look online for troubleshooting issues. After maybe 20-30 minutes I figured out a tiny little metal piece was loose where the water would have been distributed to. I was able to pop it out and place it back in. After that, and with the right settings selected through the app, everything works great. Well worth it.
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Reviewed in the United States on March 29, 2026
J
Verified Purchase
Jonathan B
Bozeman, US
★★★★★ 3
Good mop, bad avoidance
Size: C20 renewed, Size: C20 renewed
I have mixed feelings about this product: The good – It does in fact clean very well. The mop picks up dirt effectively and the vacuum works very well. It was also surprisingly good at swapping from carpet to wood. I have a high door mat and it ran right over that. It was also good at mapping rooms and positioning, the floor map and restricted areas worked nicely. App also works well. The bad – Obstacle avoidance, it has none. It will run into everything over and over. If the item is too light (shoes, mic items, etc), it will run up on top of them or push them. It will also get stuck if it runs over something. Cords have no chance. The lidar does not work for anything except a wall, and even there it was unable to deal with short trim (1” trim was too low for the lidar and it kept running into the trim). I was having to run around and ensure there was nothing on the floor for it to work effectively. It also had a lot of trouble with my dining table, it would spend 20 min bumping up against it trying to get everywhere. Overall – this is a great robot mop if your floors don’t have any items on them (or you can restrict any loose items to one area and make it a no-go zone). If that is true then this is a great mop for the price and I would recommend. In practice for me it turned out to be quite annoying due to its limited obstacle avoidance and was almost more of a pain then just using a Swiffer. Note – I had to return because it was making a scraping noise (refurbished version), that is not reflecting in my rating. Though I am also not re-buying due to these issues.
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Reviewed in the United States on September 11, 2025
M
Verified Purchase
Mónica Caicedo
Charlottesville, US
★★★★★ 5
neat
Size: C20 renewed
very nice product
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Reviewed in the United States on May 11, 2026

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