This pinion gear is composed of hard anodized chrome metal, it's 48-53HRC certified. You can find the vitality you need the auto through changing pinion gear. With comparable outside gear, you will definitely enhance your pinion gear (within allowable range) to obtain different torque and rate. (the paid down the T count, the more number of expensive the torque; the larger the T count, the quicker the price.)
Specifications: 5mm Bore Diameter/0.53mm Modulus/40CR Metal Pinion
Applications: 1/10th SCT/Truck/Monster Car (i.e. TRAXXAS 1/10 SLASH 4*4)