This pinion gear is constructed of difficult anodized chrome metal, its 48-53HRC certified. You could get the ability you need for the vehicle through changing pinion gear. With comparable outside gear, you can improve your pinion gear (within allowable range) to have different torque and speed. (the paid down the T count, greater the torque; the more expensive the T count, the quicker the speed.)
Specification: Bore Diameter: 5mm / Modulus: 0.8mm / metal Pinion: 40CR
Applications: 1/8th monster such as for example E-MAXX, E-REVO, SUMMIT etc.