VehiclesSerpent Medius X26 Carbon

Serpent Medius X26 Carbon

Name: Serpent Medius X26 Carbon
Brand: Serpent
SKU: 400051

1/10 scale · touring · 400051

The Medius X26 Carbon is a 1/10 four-wheel-drive touring race kit from Serpent, built around a carbon chassis for your choice of electronics and tires.

The kit supplies a 106T spur, while you choose the pinion for your motor and class. Confirm the complete belt reduction before calculating a final drive, and record the gears you fit in your setup notes.

Gearing Top speed

sourced

Sold without a motor, so there is no stock KV: compare gearing by rollout.

Serpent Medius X26 Carbon — Photo: Serpent (opens in a new tab)

Specifications

Last modified Oct 1, 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. Touring cars are 4WD on-road cars for asphalt and carpet tracks, often raced in classes with fixed motor and battery rules. Drive All four wheels are driven, which puts power down more evenly and keeps the car steadier accelerating out of corners. The cost is more parts to maintain. Power Sold without a motor, so you choose the motor, ESC and battery yourself. Rows that depend on the motor say so. 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. Part number The maker's product number for this exact version. A V2, a new color, or a kit instead of an RTR usually has a different number, and parts can differ between them. Check it against your box or receipt before ordering parts.
Class	Touring
Drive	4WD
Power	Motor not included
Build	Kit
Scale	1/10
Part number	400051
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. It depends on the motor you fit, so the maker does not list one. 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. The Gearing parts table below shows this car's pitch and part numbers. 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 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. On-road racers often compare gearing by rollout instead, because tire sizes differ between cars. Differentials The type of each differential, as the maker states it. A gear or ball diff lets the wheels on one axle turn at different speeds in a corner; a spool or locked diff turns them together for straight-line drive and climbing, at the cost of steering.
Pinion	Not applicable
Spur	106TStock	Stock
Transmission & axle	Not published
Final drive	Not applicable
Differentials	Spool front, gear rearStock	Stock
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. Race tires wear down over a day, and a smaller tire gears the car shorter.
Tire diameter	Not applicable
Suspension
Chassis What the main chassis is made of and how it is built, as stated for this car. Braces, stiffeners and skid plates are not counted. Carbon fiber is light and stiff, and costs more; edges can chip in a crash.
Chassis	Carbon fiberStock	Stock
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	Not applicable
Battery	Not applicable
Performance
Theoretical top speed It needs a motor KV, and this vehicle comes without a motor. Fit one and the calculator works it out from the motor's KV and the gearing.
Theoretical top speed	Not applicable

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 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 dimensions

Pinion and spur dimensions for the Serpent Medius X26 Carbon: fitted, and optional gearing supplied in the box
Component	Teeth	Pitch	Bore
Fitted at the factory
Spur	106T	64P	Not applicable

About teeth, pitch and bore

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.

How these numbers were settled

Carbon-chassis touring race kit with a supplied 106T 64P spur.

Motor, pinion, radio equipment, battery and tires are purchased separately.
The rear pulley and middle pulley are documented, but the complete front and rear reduction still needs confirmation.

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.

Show detailsHide details

Maker documents

Medius X26 Carbon assembly manual V4 (Serpent PDF) (opens in a new tab)serpent.comPDFSupports 1 specificationNI legend p.3; pinion p.40; wheels and tires p.42Used forMain specs
Medius X26 Carbon kit reference guide V2 (Serpent XLS) (opens in a new tab)serpent.comDocumentSupports 4 specificationsUsed forMain specsGearingDrivetrainSuspension

This vehicle

Serpent Medius X26 Carbon product page (opens in a new tab)serpent.comProduct pageSupports 1 specificationUsed forMain specs

Recorded components

Gear and shock identifiers recorded for this model. Each entry retains its configuration and sources.

Spur

Fitted at the factory

120013Serpent

106T · 64P

Sources

Source 1: serpent.com (opens in a new tab)

The parts bench

Start with the assembly.

Find drivetrain, suspension and steering parts first. Search any recorded part number, including hardware.

No parts collection yet

We have not collected a parts list for this exact model. Check the manufacturer documents in Details.

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