This pinion gear is made of difficult anodized chrome metal, it really is 48-53HRC certified. You can find the power you want the automobile through changing pinion gear. With the same outside gear, you can boost your pinion gear (within allowable range) to acquire different torque and rate. (the reduced the T count, the more expensive 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 vehicle (easily put. TRAXXAS 1/10 SLASH 4*4)