Road.cc has reviewed the Birzman Chain Wear Indicator II. Here is what they had to say:
The Birzman Chain Wear Indicator II is designed to measure wear in traditional 3/32in chains across the board, from singlespeed to 12-speed. This caters for most scenarios, save for track and some hub transmissions. It's nicely engineered and pleasant to use, and though digital gauges may have the last word in accuracy and precision, they're a good bit more expensive, too.
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