Originally Posted by
mozad655
As for rulers and chain wear indicators, I highly doubt that they really work. Chain wear is so microscopical that its practically impossible to measure. There are so many factors involved here that could make measurements seemingly go on either way. Just ride until you can't ride anymore and buy a new set of chain and casette around every 5-7 years.
If I did what you suggest my chains would start skipping badly enough that they would pose a safety risk when trying to cross a busy arterial. The commuting forum desperately needs a sticky post titled: do not extrapolate advice from your idiosyncratic retrogrouch experiences.