This pinion gear is made of hard anodized chrome steel, it's 48-53HRC certified. You can get the energy you need for your automobile through changing pinion gear. With the same outside gear, you are able to change your pinion gear (within allowable range) for various torque and speed. (The lower the T count, the bigger the torque; the larger the T count, the quicker the rate.)
Specification: Bore Diameter: 5mm / Modulus: 1.0mm / Steel Pinion: 40CR
Applications: the favorite 1/8th off-road (buggy and truggy)