This pinion gear is made of difficult anodized chrome steel, it is in reality 48-53HRC certified. You'll get the power you'll need the auto through changing pinion gear. With comparable outside gear, you are able to improve your pinion gear (within allowable range) for different torque and expense. (the reduced the T count, greater the torque; greater the T count, the quicker the cost.)
Specifications: 5mm Bore Diameter/0.53 Modulus/40CR metal Pinion
Applications: 1/10th SCT/Truck/Monster automobile (easily put. TRAXXAS 1/10 SLASH 4*4)