CG125 motorcycle size gear set, 38T large teeth + 15T small teeth combination, fully adapted to CG125 power system, after replacement without adjustment, directly ensure the balance between vehicle acceleration and high-speed performance; Including rear large teeth (38T) + front small teeth (15T), purchase the core gear disc parts of the transmission system at one time, without looking for separate specifications and accessories; Large tooth thickened steel plate stamping + quenching anti-rust coating, tooth surface wear resistance, disc deformation resistance, suitable for rear wheel heavy duty transmission; Small tooth manganese steel carburized quenching treatment, hardness up to HRC55+, tooth fracture prevention, suitable for high frequency power output gearbox.