This inner ring is designed as a separate component for needle roller bearing assemblies, providing a hardened cylindrical raceway surface for the rolling elements. The IR17X20X20-XL has a bore diameter of 17.0 mm and a width of 20.0 mm, with a net mass of 13.36 g, matching the seat dimensions of the corresponding outer bearing components it is intended to complete. As a standalone ring rather than a complete bearing unit, it allows the assembly to be built up on the shaft according to the required internal clearance and fit, since the raceway geometry is machined to the specified bore and width without additional sealing or lubrication features built in. Mounting requires proper shaft tolerance to achieve the intended running accuracy of the finished bearing arrangement.