These hardened steel pinion gears allow your motor to speed up faster for improved performance on the track. These gears are machined true from high grade hardened steel.
-Etched for easy identification
-Includes gears from 13 teeth to 27 teeth
-48 pitch teeth with standard 3.17mm bore.
-Includes set screws
-Includes an RPM Snap Case to hold the all in securely for FREE