This component provides the cylindrical raceway surface for the inner ring assembly of a needle roller bearing arrangement. It is manufactured with a bore diameter of 17.0 mm, an overall width of 20.5 mm, and a net mass of 14.0 g. The cylindrical inner ring design, marked XL in the designation, matches the corresponding needle roller and cage assembly of the same series, ensuring correct raceway geometry and load-bearing contact with the rollers. As a separate inner ring, it allows the raceway to be replaced without disturbing the outer bearing components, and it is suited for applications where a locally hardened, cylindrical bore raceway is required directly on the ring rather than on the shaft. Fit selection and mounting should follow the tolerance class specified for the mating needle roller and cage assembly to maintain the intended internal clearance and running accuracy.