Redcat Racing Lightning STK

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 Lightning STK manual's parts identification page lists a 03005 motor gear (26T), a 03004 diff main gear (58T), and in each diff an 02029 crown gear (38T) with an 02030 drive pinion, which Redcat's parts page lists as 13T for the Lightning STK.

• That gives 38/13 = 2.92 after the spur and 58/26 x 2.92 = 6.52 in total.
• Redcat's older Lightning EP and EPX Pro manual prints the same gear pair, '#03004-58T #03005-26T 1:6.52', as the standard brushed gearing, which confirms the total.
• The same sheet gives the on-road car's 'Diameter of Wheel' as 65mm, which is the tire, since the STK manual lists the same 02116 on-road tires.
• The manual names the HW-WP-1040-Brushed speed control, which Redcat rates at 'Max Battery: 3s 11.1v Lipo', so the cell count is 3, although the STK manual's own battery table stops at a 2S LiPo.
• The motor is a 19T 550 brushed can, so no KV.

Documents

• ManualLightning STK manual (Redcat PDF) (opens in a new tab)Parts identification, motor gear and diff main gear, PDF p. 10
• Exploded viewExploded view, Lightning STK (Redcat PDF) (opens in a new tab)PDF p. 9

Sources

• lightning-stk-on-road-carredcatracing.com (opens in a new tab)
• viewdrive.google.com (opens in a new tab)
• viewdrive.google.com (opens in a new tab)
• 02030redcatracing.com (opens in a new tab)
• 08074redcatracing.com (opens in a new tab)
• hw-wp-1040-brushedredcatracing.com (opens in a new tab)
• 03005-1redcatracing.com (opens in a new tab)
• 03004-1redcatracing.com (opens in a new tab)
• 28446redcatracing.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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