Hobby Plus Speck-SCT Brushed

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. Derived is worked out from gear tooth counts the maker publishes rather than printed as a ratio; the notes below say how. 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. Linked part numbers go to the maker's or official distributor's page for that part.

How these numbers were settled

The Speck SCT page prints its standard ratio as an 11T 0.5M pinion on a 45T 0.5M spur for a 14.03:1 final drive, with a chart of optional pairings that all agree with it.

• The reduction after the spur is worked out from that: 14.03 x 11 / 45 = 3.43.
• The shared Speck gear set page names 12T as standard, but that chart is the Speck B's; the SCT's own page is kept.
• The motor is an 050 37T brushed can, so there is no KV, and the page rates the FlySky ESC/RX combo at 2S maximum.
• The page lists the wheels at 42mm outer diameter, but that is a wheel figure and no tire diameter is published, so the tire is left blank.

Documents

• ManualInstruction manual, Speck SCT (scanned PDF) (opens in a new tab)Reduction gear box p. 20; brushless motor p. 28
• Parts listParts list, Speck SCT (in the instruction manual PDF) (opens in a new tab)Parts list p. 32-35
• Gearing chartGear ratio chart (Speck SCT product page) (opens in a new tab)Gear Ratio Chart: Standard Ratio

Sources

• speck-sct-1-24-2wd-rtr-brus…hbplusrc.com (opens in a new tab)
• spur-idler-pinion-gear-speckhbplusrc.com (opens in a new tab)
• Manual (PDF)cdn.shopify.com (opens in a new tab)
• motor-050-37t-speckhbplusrc.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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