You must remove the inner seals into to grease them; otherwise, you can't grease them. I actually tested them to see if grease would entered them on blade spindle assemblies that Husqvarna started sending them with 2RS bearings and still had grease zerks. When I tested this using a taper cone wheel bearing packer the grease actually crushed the seal on the side I was trying to force grease into. Also the seal which grease pushes against going out can be blown out too if you apply grease too fast.
Now if you don't plan to grease the bearings then the 2RS are fine until the grease dries up then you just replace them again; otherwise, I would just buy the 6203-ZZ bearings and remove the inner seals. Most bearing suppliers here charge extra to stock the single sided sealed or steel shield bearings.
