This inner ring provides the cylindrical bore-side raceway for a needle roller bearing assembly, machined to a bore diameter of 65.0 mm and a width of 25.0 mm. It is manufactured as a separate component (IR65X73X25-XL) with a net mass of 0.164 kg, allowing it to be fitted onto the shaft as the mating inner race for the corresponding needle roller and cage assembly. Being a standalone cylindrical inner ring, it is used where the bearing arrangement requires a hardened, precisely ground inner raceway mounted directly on the shaft. Its dimensions must be matched to the outer needle roller assembly it is paired with, and since no seals or integrated lubrication are part of this ring, sealing and lubrication must be provided by the surrounding housing and bearing components.