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