The 63803-2RS is a precision-engineered, thin-section deep groove ball bearing designed for applications where radial space is strictly limited, yet robust performance cannot be compromised. Featuring a specialized 17 mm bore, a compact 26 mm outer diameter, and an enhanced 7 mm width, this bearing offers a slightly wider footprint than standard ultra-thin series. This expanded width houses heavy-duty dual nitrile rubber contact seals (2RS), providing an exceptional physical barrier against water, mud, and dust, while locking in the factory-applied lubrication for the entire lifecycle of the component.