This component is a separate cylindrical inner ring designed to complete a needle roller bearing assembly, allowing the raceway to be fitted directly onto a shaft. The bore diameter is 25.0 mm, the width is 38.5 mm, and the net mass is 64.9 g. The XL design provides an extended inner ring length relative to the standard version, which increases the axial support surface on the shaft. Being a solid inner ring rather than a complete bearing, IR25X30X38,5-XL is intended for pairing with a matching needle roller and cage assembly or full complement bearing that lacks its own inner raceway. The cylindrical bore allows a straightforward interference or sliding fit on the shaft, and the extended width of the XL variant helps maintain proper support when the mating outer bearing component has a longer roller path than the standard inner ring length.