VehiclesArrma Mojave Grom 223S BLX DSC
Specifications
Last modified
| Spec | Value | Basis |
|---|---|---|
| Drivetrain | ||
| Pinion | 22TStock | Stock |
| Spur | 59TStock | Stock |
| Transmission & axle | 2.50:1Stock | Stock |
| Final drive | 6.70:1Stock | Stock |
| Wheels & tires | ||
| Tire diameter | Not published | |
| Power | ||
| Motor | 4500KVStock | Stock |
| Motor shaft | Not published | |
| Battery | Up to 3SLiPoStock | Stock |
| Performance | ||
| Theoretical top speed | Not published | |
| Advertised top speed | 50mphMaker's claim | Maker's claim |
| Vehicle | ||
| Part number | ARA2304 | |
| Scale | 1/16 | |
Stock is as the vehicle ships. Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart. Not published means it exists but no source we could find prints it.
Gearing parts
| Component | Teeth | Pitch | Bore | Part number |
|---|---|---|---|---|
| Fitted at the factory | ||||
| Pinion | 22T | Mod 0.5 | 3.2 mm | ARA-2022 (opens in a new tab) |
| Spur | 59T | Mod 0.5 | Not applicable | ARA311196 (opens in a new tab) |
Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft. Linked part numbers go to the maker's or official distributor's page for that part.
How these numbers were settled
The brushless Mojave Grom, a 1/16 desert truck with a Spektrum Firma 2838 4500Kv motor and the Spektrum Firma 25A 2-in-1 ESC and receiver rated for 2S or 3S LiPo.
- Horizon's spec table prints Pinion 22T, Spur 59, Internal Gear Ratio 2.50 and Final Drive 6.70, and 59/22 x 2.5 = 6.70.
- The standard-parts list confirms a 30T diff with 12T input gears.
- No diameter is published for the stock dBoots Fortress Grom tire, so it is left blank.
- The same truck also ships with a battery and charger as ARA2304S.
Documents
- ManualInstruction manual (Horizon PDF) (opens in a new tab)
- Exploded viewExploded view (Horizon PDF) (opens in a new tab)
- Exploded viewTechnical pack: pinion change, options, exploded view (Horizon PDF) (opens in a new tab)How to change the pinion/motor; pinion options
Sources
- ARA2304horizonhobby.com (opens in a new tab)
- searchhorizonhobby.com (opens in a new tab)
- ARA311177V2horizonhobby.com (opens in a new tab)
- ARA311182horizonhobby.com (opens in a new tab)
- ARA-2022horizonhobby.com (opens in a new tab)
- Manual (PDF)horizonhobby.com (opens in a new tab)
- Manual (PDF)horizonhobby.com (opens in a new tab)
- ARA311196horizonhobby.com (opens in a new tab)
- SPMXSM4400spektrumrc.com (opens in a new tab)
- SPMXSM4400horizonhobby.com (opens in a new tab)
Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.