That's about how much wear I had on my shoes. I examined them after I replaced my 203's with a set of gear driven S&S 570's.
I felt that this amount of wear was perfectly acceptable for the amount of miles I had at the time (17,000). While I don't care much for the chained cams, they appeared function well enough.
I dog the piss outta my bike. I expected the wear to be worse than it was. I don't know what would cause some guy's shoes are wearing excessively but I understand you can polish the chain to help reduce shoe wear.
