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Arrma Granite Grom MEGA 380
1/18basher4WDbrushed Battery + charger in box Speed-limit / training mode (manufacturer claim)
Prices (checked 2026-10-26)
AMain Hobbies$99.99out of stock
Horizon Hobby$99.99out of stock
Amazon: not checked yet. MSRP: $99.99 — Manufacturer store price on HorizonHobby.com (Horizon Hobby owns Arrma/Losi/Axial)
See it at AMain Hobbies See it at Horizon Hobby
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Facts
| Claimed top speed (stock) | 20+ mph (Horizon listing label) — manufacturer claim |
|---|---|
| Claimed top speed (optional battery) | n/a |
| Speed-limit / training mode | Yes — SLT2 speed limiting 50% or 75% (manufacturer claim) |
| Water claim | "Waterproof" ESC/receiver and servo (manufacturer claim) |
| Battery included | y — 2S 1400mAh LiPo |
| Charger included | y (USB-C) |
| You will also need | USB power adapter QC2.0/3.0 18W+ |
| Parts availability | AMain search "arrma granite grom" first page listed 43 non-vehicle parts/accessories (2026-10-19); many parts listed |
| Manufacturer's stated age | not found on retailer listings checked; check box/manual |
| FirstRC criteria-based suggestion | 10+ with adult supervision claimed stock speed ~20 mph; LiPo battery: adult should handle charging/storage [FirstRC criteria, not manufacturer guidance]. This is our rule of thumb from published specs, not a safety rating. The manufacturer's age on the box always wins. How we calculate it. |