Apex RC Products Mod 1 Pinion Gear Set – 19 and 20 Tooth, 5mm Bore, 2-Pack (1/8 Scale)

This Apex RC Products pinion gear set gives you two precisely made gears for 1/8 scale RC vehicles with a 5mm motor shaft. The set includes a 19-tooth and a 20-tooth pinion, both Mod 1 (M1) pitch, CNC machined from steel for a smooth mesh and long wear. Each gear has its tooth count engraved directly on the body, so you always know which is which.

What pinions are included in this set?

You get two pinions: one 19-tooth and one 20-tooth. Both have a 5mm bore, Mod 1 module, and fit 1/8 scale RC cars, trucks, and buggies that use standard 5mm motor shafts. The 19-tooth provides slightly lower gearing for more acceleration, while the 20-tooth gives a bit more top speed — swapping them lets you fine-tune your setup.

Key details about this pinion gear set

• CNC machined: Each gear is cut from steel on a CNC machine for accurate tooth profiles and a consistent mesh with the spur gear.
• Steel construction: The hardened steel material resists wear and deformation under high RPM and torque loads.
• Engraved size: The tooth count is laser-engraved on the face of each pinion, making identification easy even when installed.
• Two per lot: The set includes exactly two pinion gears — no need to buy singles separately.

Specifications at a glance

Common questions about the Apex RC Products pinion gear set

Are these pinions hardened?

The steel used is chosen for durability, but the exact hardness level is not specified by the manufacturer. They are intended for high-performance RC use and should hold up well under normal running conditions.

What vehicles can I use these with?

Any 1/8 scale RC vehicle that uses a 5mm motor shaft and Mod 1 pitch gears. This includes many brushless systems in buggies, truggies, and monster trucks. Always check your spur gear pitch before ordering.

How many gears come in a lot?

Each lot contains two pinion gears — one 19T and one 20T. You cannot choose two of the same tooth count; the set is mixed.

Is the bore pre-drilled for a setscrew?

The specifications do not mention setscrew holes. Many pinions of this type require you to drill and tap your own setscrew hole, or use a grub screw if provided. Check your motor shaft and mounting method before installation.