ECX AMP MT 2WD

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

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 (3.175 mm on the stock motor). Linked part numbers go to the maker's or official distributor's page for that part.

How these numbers were settled

Horizon's spec table prints an 18T pinion, an 87T spur and a 4.3in (110mm) outer tire diameter.

• The build-to-drive kit version of the same truck (ECX03034) prints the internal ratio as 2.6 and the final drive as 12.6 on the same 18T and 87T gears, and its manual names the ECX1022 transmission gear set.
• The motor is a Dynamite 20T brushed 540, which has no KV rating.
• Horizon publishes no LiPo rating for the RTR's speed control, so the cell count is left blank.

Documents

• ManualQuick-start manual, AMP MT and DB (Horizon PDF, multilingual) (opens in a new tab)

Sources

• ECX03028horizonhobby.com (opens in a new tab)
• ECX03034horizonhobby.com (opens in a new tab)
• Manual (PDF)horizonhobby.com (opens in a new tab)
• ECX1076horizonhobby.com (opens in a new tab)
• DYN1171horizonhobby.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.

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