my $6 peformance bikes chain wear gauge indicates my chain is not worn to the point of needing replacement.
however, my shifting/drive-train is acting squirrelly. the chain sometimes jumps off the chain rings when i shift up or down. also, shifting in to larger cogs in the middle of the cassette is strange. i have a hard time shifting just one cog. it usually doesn't shift at all or jumps 2 cogs.
i had a nbc at about 500 miles. does cable stretch occur throughout the life of your bike?
i'm suspecting my chain is too loose. should i try removing a link?