Originally Posted by
rdtompki
I was considering trying my spare RD, lubing the cable, etc. when in a moment for tardy inspiration I got out my low tech chain checker: the 1% gauge dropped in easily
.
Unless your checker is the Shimano TL-CN41, pitch it and use a ruler to measure the chain.
The other checkers are primarily for *selling* chains, not measuring real wear.
Explanation here:
http://pardo.net/bike/pic/fail-004/000.html