This pinion gear contains hard anodized chrome steel, it really is 48-53HRC certified. You are getting the power you'll need for the automobile through changing pinion gear. With comparable outside gear, you'll be able to enhance your pinion gear (within allowable range) to have different torque and rate. (the reduced the T count, the more expensive the torque; the larger the T count, the faster the rate.)
Specification: Bore Diameter: 5mm / Modulus: 0.8mm / Steel Pinion: 40CR
Applications: 1/8th monster like E-MAXX, E-REVO, SUMMIT, 1/10th SLASH 4*4 an such like.