My chain is past .75% gone. It was new along with cassette (chainrings nearly new 3000mile on them) pre- EV6 ride early this summer. As I'm using it local I'll stick with it. It will last the crap winter, until my next tour in 2015, when new chain & cassette will be fitted. I 'd love to rotate chains every 600 mile or so, but I',m useless at remembering.