Originally Posted by
HillRider
I believe that "split ring" is the conical compression ring that keeps the upper bearing cartridge centered on the steerer. It's not part of the bearing assembly. I agree the lower item is just a dust seal, probably rubber or plastic.
Neither part is going to be easy to source as replacement items and starting from scratch with a new headset is probably the best approach. Note the OP is in Spain and likely doesn't have access to many of our (USA) suppliers.
many thanks for all your answer here impossible to find spare parts for components discontinued , CB don,t make this headset ( is made in taiwan Mail sent to Crank Brothers for these parts ,waiting answer, thank,s again