This Viper Scale Racing high performance 7 tooth pinion gear has an all new profile and tooth geometry. It's whisper quiet and smooth. Great mesh with most HO slot car crown gears on the market and is made to press fit onto a 1.5mm diameter motor shaft.
Features: recessed neck for easy installation, zero flashing and lightweight.
Includes: 1 - 7T pinion gear.
Note: Recommended for ages 14 to adult.