Today I decided to clean my chain and removed it.
It's the first time I do this.
May be it's nothing, but since I don't know what the marks are, I ask you... what are those?
I noticed them after cleaning the chain.
They are in every link, and are either on one side or the other (they are not on the middle, nor in both sides).
This chain has about 150 miles. It is a SRAM PC-58.