MODEL DATA / ARA2102 2026-11-04
GRANITE GROM brushed specs and buying notes
Arrma / ARA2102
GRANITE GROM brushed is a 1/18 monster truck with 4WD and a brushed motor. The maker lists $149.99 (USD maker list price).
Exact package ARA2102. Maker list price is the USD list-price record for this variant, read 2026-11-04. RTR/RTF means assembled; check the separate-purchase list.
Monster truck · 4WD
Brushed
- Maker list price / USD
- $149.99
- Source read
- 2026-11-04
- Drive battery included
- Yes
- Charger included
- Yes
What else must you buy?
(1) USB power adapter with QC 2.0/3.0 18W+
Check the charging setup ↗What comes 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
How large is this exact model?
Bars compare published measurements against the catalogue’s largest value. They describe size, not performance.
What specifications does the maker publish?
| Field | Maker data |
|---|---|
| Scale | 1/18 |
| Vehicle type | Monster truck |
| Drive | 4WD |
| Length (mm) | 250 |
| Width (mm) | 200 |
| Height (mm) | 118 |
| Wheelbase (mm) | 165 |
| Weight (g; maker basis) | 800 |
| Motor | (1) ARRMA MEGA 380 28T Brushed Motor |
| Motor type | Brushed |
| Motor kV (rpm/volt) | not published |
| Electronic speed control (ESC) | (1) Spektrum™ Waterproof SLT™ 2-in-1 25A ESC & Receiver |
| Recommended battery | (1) Spektrum Smart 7.4V 1400mAh 2S 30C Hard Case LiPo Battery |
| Pack cells in series | 2 |
| Pack nominal voltage (V) | 7.4 |
| Battery connector | IC2 |
| Maker speed claim and setup | not published |
| Maker water wording | Water-resistant per maker; follow the manual; no immersion permission |
| 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 |
| Drive battery included | Yes |
| Charger included | Yes |
| Maker list price (USD) | $149.99 |
| Supplied capacity (mAh) | 1400 |
| Tire diameter (in) | not published |
| Total gear ratio | not published |
| Ready-to-run / ready-to-fly | Yes |
| Maker age guidance | not published |
| Separate purchases per maker | (1) USB power adapter with QC 2.0/3.0 18W+ |
Source: Exact maker document read 2026-11-04. A different source is shown beside the affected field. “Not published” means no supported value was captured, including access gaps.
Which similar models can you compare?
These are the two nearest documented lengths in this vehicle group; missing lengths sort as zero. This is a size comparison, not a ranking.
Load published calculator inputs ↗
Which sources support this page?
Use the exact model code when checking a maker page. The read date is a record of our research, not a promise that a listing stays unchanged.
- Arrma GRANITE GROM brushed maker specifications Exact package ARA2102. Maker list price is the USD list-price record for this variant, read 2026-11-04. RTR/RTF means assembled; check the separate-purchase list.