Originally Posted by
jimmuller
Yes, the previous chain was SRAM PC870, like this one. A wear spec I had seen here in BF was to replace a chain at 10% elongation which seem like a lot, or else I totally misunderremember it, or rather misoverremember it.
I think you might be misremembering it. Recommendations I've seen elsewhere say one should replace 5-10 speed chains at 0.75% elongation (Park Tool goes on to recommend replacement at 0.5% elongation for 11- or 12-speed and at 1% for single-speed). If a chain wears much farther than that, chances go up that you might also have to replace the freewheel/cassette and/or chainrings due to wear.
https://www.parktool.com/blog/repair...n-on-a-bicycle
If it took only a bit more than 11 links to measure 12" when under reasonable tension, you might have been a wee bit past 0.75% elongation. (smile)
Reminds me, I probably should use the chain wear checker before today's ride.