78215C/78537A Tapered Roller Bearing 2-1/8" x 5-3/8" x 1-7/16"78215C 78537A Tapered Roller Bearing Cone + Cup Set 2 3 8" x 5 3 8" x 1 7 16" Single Row Chrome Steel The 78215C 78537A is a single row tapered roller bearing built to handle both radial and axial loads in one direction. Made from high strength 52100 chrome steel, this bearing set is ideal for heavy duty applications including truck hubs, machinery, and agricultural equipment where precision and durability are essential. Cone: 78215C Cup: 78537A Bore