HPI Racing Stage-D10 Ford Mustang RTR Spec 5-FD

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 does this gearing compare with similar cars? What's a normal final drive for your RC?

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.

Buying a new pinion or spur? Check what’s fitted first: Why your RC's gear specs might not add up

How these numbers were settled

This 2WD drift chassis uses a fixed 2.6 to 1 internal ratio and a 20-turn brushed 540 motor, the same gearbox listed in the platform's technical guide and its own setup sheet, both of which print a 27-tooth pinion, an 80-tooth spur and a 7.7 to 1 final drive.

• The waterproof speed control is rated for 2S or 3S LiPo packs.
• The tire compound is named but its diameter is not published, so it is left blank rather than guessed.

Sources

• 161004hpiracing.com (opens in a new tab)
• Manual (PDF)hpiracing.com (opens in a new tab)
• Manual (PDF)hpiracing.com (opens in a new tab)
• 114712hpiracing.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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