Closed wheel bearing ( 2 x 7/8 x 9/16″ 51 x 22 x 14,25 mm. )
Front Fitment : BSA C12 Swinging arm, C25/B25, B31 Rigid/Tele, B31/B32 Plunger/Swinging arm, B44, M20 Rigid/Tele (all with 7″ half width hubs), M20 Plunger, B33 Rigid/Tele, B33 Plunger, B33/B34 Swinging arm, A7 Plunger/Swinging arm, A50, M21 Rigid/Tele, M21 Plunger, A10 Plunger/Swinging arm, A65 (all with 8″ half width hubs), B34 Swinging arm, A10 RGS, A65 Spitfire (all with 190mm hubs), Sunbeam S8
Rear Fitment: Royal Enfield 500cc Twins (1949-60)
Part numbers 41-6016, 41-4017, 89-5727 en 37-1041.