Hi, I have a parks chain checker and my chain still doesn't indicate it needs changing (.75) BUT I'm not about to trust that tool , so I measure 12 pins with a steel ruler and see if there is 1/16" stretch and from pin center to 12 pins over and i'm at the center of that pin (6" ) this is after 3000 miles . Is it possible to have almost no stretch after 3K miles ?? Yes I did check in a few spots..
BTW my chain is a shimano 6700
One ? is when new is 12 pins center to center 6" even ??
Also what are you getting for miles out of your chains ?