This pinion gear is constructed of difficult anodized chrome steel, it is 48-53HRC certified. You may get the ability you want for the vehicle through changing pinion gear. With the same outside gear, you can improve your pinion gear (within allowable range) to obtain various torque and speed. (the low the T count, the larger the torque; the larger the T count, the faster the speed.)
Specifications: 5mm Bore Diameter/0.53mm Modulous/40CR Steel Pinion
Appplications: 1/10th SCT/Truck/Monster Truck (in other words. TRAXXAS 1/10 SLASH 4*4)