AIMROCK 5-Pack Mod 1 Pinion Gears (13T-17T) for 1/8 RC Cars with 5mm Motor Shaft

This AIMROCK five-pack gives you five Mod 1 pinion gears ranging from 13 to 17 teeth, each with a 5mm bore to fit standard 1/8 RC car motors. Made from hardened steel, they are intended for use with steel spur gears only; pairing them with plastic or aluminum spurs can cause damage. This set is a popular upgrade for vehicles like the Arrma Typhon, Kraton, and Outcast 6s, letting you adjust gear ratios for different track conditions or driving styles.

What vehicles are these pinion gears compatible with?

These pinion gears are designed for 1/8 scale RC cars that use Mod 1 spur gears and a 5mm diameter motor shaft. Common compatible models include the Arrma Typhon, Kraton, Outcast 6s, and many other 1/8 buggies and truggies. They may also work on some 1/10 scale vehicles if the drivetrain uses Mod 1 pitch and the motor shaft is 5mm. Always check your spur gear pitch and shaft size before ordering.

Gear pitch and material considerations

The set uses Mod 1 pitch, which is a common standard for 1/8 RC cars. These gears do not mesh with other pitches like Mod 0.8 or 48P. The hardened steel construction provides good durability when run against a steel spur gear. Note that using these pinions with softer spur gears (plastic or aluminum) will likely strip the spur teeth quickly.

Package contents and specifications

Frequently asked questions

Can I use these with a plastic or aluminum spur gear?

No. The manufacturer warns against using these pinion gears with plastic or aluminum spur gears as it will damage the spur gear. They are designed for steel spur gears only.

Will these fit my 1/10 scale RC car?

They can be used on 1/10 cars if the motor shaft is 5mm and the spur gear is Mod 1 pitch. Many 1/10 cars use smaller pitches like 48P or 32P, so verify compatibility before ordering.

What is included in the package?

The package contains five pinion gears (13T, 14T, 15T, 16T, 17T), five grub screws, and one steel hex key.