Can we replace the wheel 81-228 with 81-241?




That's a great question. Yes, the 81-228 Nylon Wheel can be replaced with the 81-241 Stainless Steel Wheel. They are the same size so they should be applicable in all the same assemblies.
Now, as for the axles, it mostly depends on your application and what length of axle you'll need. In terms of fit, the 81-304 Axle will slip in and out pretty easily, whereas the 81-203, 81-303 and 81-307 are a bit difficult to move and are made to lock into the roller.
EDIT: In the years since this response was made, our 81-241 has unfortunately been discontinued and is no longer possible for us to supply. If you need a replacement wheel that can withstand corrosion, we recommend the 81-228. This part is made of nylon and should work well in all the same applications as the old 81-241.