Originally Posted by Dan Alexander
If you mean the separations in the disc, it's not from wear, it's made that way for some reason. Maybe keeps it lighter or more flexible?
Yep, that what I was referencing as I was unaware of OEM segmented discs (as was Anorak, apparently). When Steptoe called it a "standard disc" I figured he meant OEM, but I wondered if it was an aftermarket disc since it was segmented. Others here know more about that than me though.