Luis
Well-known member
As much as I did a search in the forum, I couldn't find information about what you see in the photos. I may have read it here or on Facebook. I think a thread has already been written about it, and if so please let me know and I'll delete this one. Or, if there is nothing above, I will appreciate your help. What is this that appears on my rear wheel? Anything to worry about? Thanks in advance