Machined from high tensile strength, impact and wear resistant chromoly steel to minimize deformation. Inner splines are broached to provide maximum spline-to-countershaft contact to distribute driveline forces over the largest possible surface area. Heat-treated, then finished with a nickel coating for corrosion resistance and lubricity. Each sprocket is quality checked by Computer Measurement Machine (CMM) to exactly match OEM design specifications. Fitments available for Two Wheel Dirt, ADV, and ATV applications. Be sure to check for clearance when ordering sizes larger than stock..