NATIONAL 25580/25520 SETA52 Tapered Wheel Bearing Cup & Cone 1-3/4″ Bore Trailer
SET52 NATIONAL 25580/25520 BEARING SET 25520 / 25580 25520/25580. Size: 1-3/4″ ID x 3-17/64″ OD x 15/16″ Width. Cone Bore (mm): 44.45mm. Cone Radius (mm): 3.556mm. Cone Length (mm): 25.4mm. Radius (mm): 0.787mm.