Manufacturer Description

This is a Robinson Racing Extra Hard Steel 5mm Bore .8 Mod, 22 Tooth
Pinion Gear. These pinions fit brushless motors with a 5mm shaft and are
intended for use with the Traxxas E-Maxx model #3905. These will also
work with standard size brushless motors when used with the RRP1200
reducer sleeve, making them an excellent choice for the Traxxas Slash
4x4.