GENUINE ALKO Euro wheel bearing is a 1 peice compact assembly, used in AL-KO 2051 hub drum (heavy duty axle) and used by Avonride, Peak, Knott, BPW in their 250 x 40 hub drum assemblies. Check dimension in More Info.
External Diameter: 72mm, Internal Diameter: 39mm, Length: 37mm
Sold as bearing alone, bearing & axle nut, and bearing, axle nut & dust cap.
Axle nut: 32mm 581200 (older version used 36mm nut but this has been replaced)
Dust cap: 55mm, H: 27mm 581197
KNOTT AVONRIDE: 45887.11