Traxxas BIGFOOT No. 1 XL-5 w/Battery

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 mm on the stock motor). Gearing in the box is supplied, not fitted: the fitted set is what the figures and the calculators use. Linked part numbers go to the maker's or official distributor's page for that part.

How these numbers were settled

The owner's manual gear chart (p. 26) marks the 14T pinion on the 90T spur, 17.49, as stock and the 19T pinion on the same spur, 12.88, as included optional gearing; the manual's text tells owners to install the included high-speed gearing for more top speed.

• It works the ratio as spur / pinion x 2.72 for the Magnum 272 transmission.
• The parts list sets the 14-tooth pinion (2427) and the 90-tooth spur (4690) in regular type, and both part pages list this truck as a stock fitment.
• Traxxas's product page prints 'Gear Ratio (Internal): 2.72 (final drive: 12.34)', the same figure as on the brushless BIGFOOT No. 1; it matches neither gear set in the manual, so the manual's figures are shown here.
• The Titan 12T 550 is a brushed motor, so there is no Kv figure.
• The stock tires are Terra Groove on 2.2 in chrome wheels (3663X); Traxxas does not publish their outer diameter, so the tire is left blank.
• Traxxas quotes 30+ mph with a 7-cell battery without saying which pinion that assumes; a 7-cell NiMH pack comes in the box.

Documents

• ManualOwner's manual, model 36234-8 (Traxxas PDF) (opens in a new tab)Gearing p. 26
• Gearing chartGearing compatibility chart, owner's manual (Traxxas PDF) (opens in a new tab)p. 26
• Parts listParts list, 36234-8 (Traxxas PDF) (opens in a new tab)Spur Gears & Pinion Gears, p. 5

Sources

• bigfoot-no-1-xl-5-wbattery-…traxxas.com (opens in a new tab)
• Manual (PDF)traxxas.com (opens in a new tab)
• Manual (PDF)traxxas.com (opens in a new tab)
• 2427-14-tooth-pinion-gear-4…traxxas.com (opens in a new tab)
• 4690-90-tooth-spur-gear-48-…traxxas.com (opens in a new tab)
• 2419-19-tooth-pinion-gear-4…traxxas.com (opens in a new tab)
• 3663x-chrome-monster-truck-…traxxas.com (opens in a new tab)
• 3654-12-mm-tall-offset-whee…traxxas.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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