This is a cylindrical inner ring designed to be combined with a needle roller bearing without an inner ring, providing a hardened and ground running surface for the rollers. Bore diameter is 55.0 mm and width is 25.0 mm, with a net mass of 0.14 kg. The XL execution indicates an extended inner ring width relative to standard design. Because the inner ring carries the rolling elements directly on its outer surface, it must be fitted with matching needle roller bearings sharing the same bore and width dimensions to form a complete bearing arrangement. The cylindrical bore allows a straightforward shaft fit without additional adapter sleeves, and the component is supplied as a separate part, requiring correct axial and radial positioning during assembly.