VehiclesArrma Senton 4X2 BOOST MEGA 550
Arrma Senton 4X2 BOOST MEGA 550
1/10 scale · short course truck · ARA4103V4
- Final drive
- 15.26:1
- Tire
- 104mm
Specifications
Last modified
| Spec | Value | Basis |
|---|---|---|
| Drivetrain | ||
| Pinion | 17TStock | Stock |
| Spur | 91TStock | Stock |
| Transmission & axle | 2.85:1Stock | Stock |
| Spur ÷ pinion | 5.353:1Calculated | Calculated |
| Final drive | 15.26:1Stock | Stock |
| Wheels & tires | ||
| Tire diameter | 104mmStock | Stock |
| Rollout | 21.4mm per motor turnCalculated | Calculated |
| Power | ||
| Motor | Not applicable | |
| Motor shaft | Not published | |
| Battery | Up to 2SLiPoStock | Stock |
| Performance | ||
| Theoretical top speed | Not applicable | |
| Vehicle | ||
| Part number | ARA4103V4 | |
| Scale | 1/10 | |
| Class | Short course truck | |
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 applicable means the vehicle does not come with it, like the motor on a roller or the tires on a race kit, or does not have one, like a KV rating on a brushed motor. 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 | 17T | 48P | Not published | ARAC7784 (opens in a new tab) |
| Spur | 91T | 48P | Not applicable | ARA311030 (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
Brushed MEGA 550 12T motor, so there is no KV.
- The Spektrum 40A brushed 2-in-1 ESC and receiver is rated for 2S LiPo or 6 to 7-cell NiMH.
- The BOOST trucks drive the rear wheels only through the same 37T diff and 13T input gear as the 4X4 trucks.
- Horizon prints Pinion 17T, Spur Gear 91T, Internal Gear Ratio 2.85 and Final Drive 15.26, and 91/17 x 2.85 = 15.26; the standard-parts list confirms the 17T, the 91T and the 37T/13T diff gears.
- Horizon names the tread as dBoots Fortress SC, whose own page (ARA550087) prints an overall diameter of 4.1 in (104mm).
Documents
Sources
- ARA4103V4horizonhobby.com (opens in a new tab)
- searchhorizonhobby.com (opens in a new tab)
- ARA550087horizonhobby.com (opens in a new tab)
- ARAC7784horizonhobby.com (opens in a new tab)
- interactive-exploded-viewhorizonhobby.com (opens in a new tab)
- ARA311030horizonhobby.com (opens in a new tab)
- ARAG1005horizonhobby.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.