Pinion gears and spur gears : 48dp or 64dp?

In the exciting world of RC drift, two crucial components play a major role in your vehicle's performance : the pinion and the spur gear. These drivetrain elements not only determine the speed and acceleration of your RC car, but also influence its ability to drift with precision and efficiency.

Pinion and Spur Gear : Definitions

• The Pinion is the small gear attached directly to the motor shaft. Its size and number of teeth are key factors in transmitting the motor's power to the wheels.
• The Spur Gear is the large gear that meshes with the pinion. Mounted on the transmission shaft that drives the wheels, the spur gear receives the driving force from the pinion to propel the car.

Difference Between 64dP and 48dP

The distinction between 64P and 48P lies in their "pitch" - the term "P" referring to the "gear pitch", which measures the tooth density on a gear. The "pitch" is essential because it influences drivetrain smoothness and the precision of the mesh between the pinion and the spur gear.

• 64P : A finer pitch, with 64 teeth per inch. 64P systems offer smoother transmission and are often preferred for competition and high-precision applications, where precise control of speed and acceleration is crucial.
• 48P : With a coarser pitch of 48 teeth per inch, 48P systems are robust and forgiving, ideal for beginners or for racing conditions where durability takes priority over extreme precision.

Calculating the Ratio Between 48dP and 64dP

The gear ratio between the pinion and the spur gear is crucial for optimizing the performance of your RC drift car. This ratio, generally expressed as a division (pinion/spur gear), determines your vehicle's acceleration and top speed.

The ratio calculation is directly influenced by the "pitch" because it determines the actual size of the pinion and spur gear that can mesh together. For a given system, whether 48P or 64P, you must first choose pinions and spur gears that are compatible in terms of pitch.

• Spur Gear Conversion for RC Drift Cars

From 64p to 48p

To convert the number of teeth on a 64p spur gear (pitch) into its 48p equivalent, use the following formula :

Number of teeth in 48p=(64/Number of teeth in 64p / 64)×48

From 48p to 64p

To convert the number of teeth on a 48p spur gear to its 64p equivalent, apply this formula :

Number of teeth in 64p = (Number of teeth in 48p / 48) × 64

These formulas make it possible to maintain a similar physical size between the two pitch standards, ensuring optimal compatibility of drivetrain components for your RC drift vehicles.


This adjusts the number of teeth to maintain a similar physical size between the two pitch standards.
In summary, the choice between 48P and 64P depends on your needs in terms of performance and durability, while the precise calculation of the gear ratio will help you optimize your RC drift car for the desired speed, acceleration, and handling.