219 Chain Wear Indicator Tool

This tool helps you to know easily and quickly the wear of the chain. It is essential but simple to use.
A worn chain widely increases the consumption of the sprockets.
This tool has 2 measurements:
- side 1: you can define when you should not use the chain during a race
- side 2: it determines when you MUST immediately change the chain because of too much wear
If the chain doesn't fit the tool it means that the wear is NOT too much