VehiclesTamiya MF-01X

Tamiya MF-01X Chassis

Name: Tamiya MF-01X
Brand: Tamiya

1/10 scale · 4WD chassis · sold as kits

Tamiya's MF-01X is a compact 1/10 shaft-driven four-wheel-drive chassis sold under rally cars and small off-roaders such as the Volkswagen Beetle Rally and the Suzuki Jimny (JB23).

Its manual table gives 9.45:1 on the 16T pinion in the kit, 8.89:1 on a 17T, 8.4:1 on an 18T, 7.95:1 on a 19T and 7.56:1 on a 20T. The three-piece frame sets up at a 210 mm, 225 mm or 239 mm wheelbase to suit the body. Tamiya does not publish the spur or the gearbox stage, so enter your pinion in the gearing tool.

Final drive: 7.56 to 9.45:1on 20T to 16T
Wheelbase: 210 / 225 / 239mm
Introduced: 2015

Gearing Top speedsourced

The pinion, motor and tires come with each kit: enter yours in the gearing tool.

Tamiya MF-01X — Photo: Tamiya (opens in a new tab)

Kits on this chassis Built on the MF-01X

Each kit adds its own body, tires, pinion and motor. The chassis figures below apply to all of them.

Kit	Part no.	Maker page
Fiat 131 Abarth Rally Olio Fiat	58723	tamiya.comPage (opens in a new tab)
Volkswagen Golf II GTI 16V Rally	58714	tamiya.comPage (opens in a new tab)
Ford Escort Mk.II Rally	58687	tamiya.comPage (opens in a new tab)
Volkswagen Beetle Rally	58650	tamiya.comPage (opens in a new tab)
Suzuki Jimny (JB23)	58614	tamiya.comPage (opens in a new tab)
Suzuki Jimny (JB23) Painted Metallic Blue Body	58621	tamiya.comPage (opens in a new tab)

Specifications

Last modified Sep 29, 2026

Spec	Value	Basis
Vehicle
Class The kind of vehicle the maker sells it as. It sets what the car is built to do and which cars it is fair to compare it with. Rally cars are 4WD cars with more suspension travel and treaded tires, for dirt, gravel and broken pavement. The maker does not name a class for this one, so this is the site's judgment from its design. Drive All four wheels are driven. That gives more grip under power, especially on loose ground. The cost is more parts to maintain. Build A kit you build yourself from parts. Most kits come without motor, ESC, servo, radio and battery, and many without tires or a painted body. The manual lists what to add. Scale The maker's nominal size compared with a full-size vehicle. It works more as a class label than a measurement. A 1/10 monster truck is far bigger than a 1/10 touring car, so compare length and weight for real size.
Class	Rallyour call
Drive	4WD
Build	Kit
Scale	1/10
Drivetrain
Pinion The small gear on the motor shaft. Fewer teeth gear the car shorter: quicker acceleration, lower top speed and a cooler motor. More teeth do the opposite. On a chassis sold as kits, each kit brings its own. Spur The large gear the pinion drives. A bigger spur with the same pinion gears the car shorter. Pinion and spur must have the same pitch, or tooth size, to mesh. Transmission & axle Every reduction after the spur, multiplied together: transmission, differentials and axle gears. It is fixed by the design; the gearing you change is the pinion and spur. Final drive, printed How many times the motor turns for one turn of the wheels. A higher number is shorter gearing: more acceleration and pulling power, less top speed.
Pinion	With each kit
Spur	Not published
Transmission & axle	Not published
Final drive, printed	9.45:1 on 16T, 8.89:1 on 17T, 8.40:1 on 18T, 7.95:1 on 19T, 7.56:1 on 20TMaker's chart	Maker's chart
Wheels & tires
Tire diameter The outside diameter of the mounted tire, tread to tread. A taller tire covers more ground each turn, which gears the car taller. At high speed tires can balloon and grow, so the real gearing gets taller as the car goes faster.
Tire diameter	With each kit
Power
Motor Motor KV is the RPM a motor turns per volt with no load. This vehicle comes without a motor, so there is no stock KV; it depends on the one you fit. Battery The highest LiPo cell count the maker rates the electronics for. This vehicle comes without electronics, so it depends on the ESC and motor you fit.
Motor	With each kit
Battery	With each kit
Size & weight
Wheelbase The distance between the front and rear axle centers. A longer wheelbase is steadier at speed and over bumps; a shorter one turns more tightly. This chassis can be set to more than one wheelbase.
Wheelbase	210 or 225 or 239mm, 3 settingsStock	Stock

How to read these figures

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 published means it exists but no source we could find prints it.
With each kit means each kit on this chassis brings its own, so enter yours in the gearing tool.
Maker’s chart is the ratios the maker prints for this chassis with the pinions it names.

How these numbers were settled

The MF-01X manual prints a gear ratio table (PDF p. 20, 'ギヤ比 / GEAR RATIO'): 16T 9.45:1 with the kit pinion ('キット付属 Included in kit'), 17T 8.89:1, 18T 8.40:1, 19T 7.95:1 and 20T 7.56:1, and pinion x ratio stays between 151.0 and 151.2 across the table.

Every MF-01X kit page rounds the kit figure to 'ギヤ比=9.5:1' ('Gear Ratio = 9.5:1' on the English Volkswagen Beetle Rally 58650 page).
The manual shows the spur without a tooth count and the gearbox stage is not published, so pinion x ratio is the only gearing fact.
Shaft-driven 4WD ('駆動方式=シャフトドライブ4WD').
The three-piece frame takes S, M and L wheelbases, which the manual prints as 210mm, 225mm and 239mm (PDF p. 4); the kit pages print 225mm (M, Suzuki Jimny) and 239mm (L, Beetle Rally, Escort Mk.II, Golf II, Fiat 131).

Sources

Every figure on this page traces to one of these; where they disagreed, the note above says which was used and why. Links open in a new tab.

Maker documents

MF-01X chassis instruction manual (Tamiya PDF) (opens in a new tab)Wheelbase settings p. 4; gear ratio table p. 20tamiya.comUsed forMain specs

Parts and electronics

Products 58650 (opens in a new tab)tamiya.comUsed forMain specs
Products 58650 (opens in a new tab)tamiya.comUsed forMain specs
Products 58614 (opens in a new tab)tamiya.comUsed forMain specs
Products 58687 (opens in a new tab)tamiya.comUsed forMain specs
Products 58714 (opens in a new tab)tamiya.comUsed forMain specs
Products 58723 (opens in a new tab)tamiya.comUsed forMain specs
Product info EX (opens in a new tab)tamiya.comUsed forMain specs

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