"Sounds like normal wear for the rears. I get about 4000 mi on set of PS2 rears."
I have gotten as little as 4000 miles on my PS2's, but I normally get 5-6K on a set of rears. That is one reason I bought another set of wheels and put some inexpensive Nexin's on them. The Nexin wear well, but I rarely use them because they dont stick like the PS2's.
Ed