This pinion gear consists of hard anodized chrome steel, it's 48-53HRC certified. You can get the energy you need for the car through changing pinion gear. With similar outside gear, you'll improve your pinion gear (within allowable range) to get various torque and rate. (the reduced the T count, the larger the torque; the bigger the T count, the faster the speed.)
Specification: Bore Diameter: 5mm / Modulus: 1.0mm / metal Pinion: 40CR
Applications: the Popular 1/8th off road (buggy and truggy)
