FMS FCX24 Mercedes-Benz Unimog 421

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.

How these numbers were settled

FMS's manual (MAN-G0253) gives the two-speed gearbox 'a low gear reduction ratio of 99' and 'a high gear reduction ratio of 24.75'; the high gear is used here and 99 is the crawl ratio, and FMS's European distributor Beez2B prints the same pair.

• The manual's specification page prints the tire as 'Φ 59*20mm'.
• The motor is a brushed can (the manual says 130, Beez2B says 050), so there is no KV.
• The FMS-R3A receiver and ESC unit takes '2S Lithium batteries', and the truck ships with a 2S 380mAh pack.
• No tooth counts are printed, so the pinion, the spur and the ratio after it are left blank.

Sources

• Fms-1-24-Fcx24-Unimogmanualslib.com (opens in a new tab)
• 16539-fms12405rtr-rd-FMS124…beez2b.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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