This pinion gear consists of difficult anodized chrome metal, it is 48-53HRC certified. You may get the energy you want for your vehicle 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 larger the T count, the quicker the rate.)
Specifications: 5mm Bore Diameter/0.53mm Modulus/40CR Metal Pinion
Applications: 1/10th SCT/Truck/Monster Truck (i.e. TRAXXAS 1/10 SLASH 4*4)