This pinion gear contains difficult anodized chrome steel, it is 48-53HRC certified. You're getting the energy you'll need the car through changing pinion gear. With comparable outside gear, you'll be able to boost your pinion gear (within allowable range) to own various torque and price. (the paid off the T count, the greater expensive the torque; the larger the T count, the faster the price.)
Specification: Bore Diameter: 5mm / Modulus: 0.8mm / metal Pinion: 40CR
Applications: 1/8th monster like E-MAXX, E-REVO, SUMMIT, 1/10th SLASH 4*4 etc.