This question comes up often enough to try and answer it, but unfortunately there's no magic answer. In fact MTB chainrings chainrings don't have wear indicators, and the different tooth designs of different brands make it difficult to create a tool for monitoring wear.
Here are a few ways to judge the wear of your chainring
- The first is as simple as it is obvious: gears are unstable when the material is too worn. If you've just replaced your chain/cassette assembly and your front derailleur is in good condition, but the chainrings don't shift well: there's no doubt that the chainrings need replacing.
- The second requires a MTB chain chain. Place the chain on the chainring, pull on it, and at the highest point you must not be able to reveal more than half the chainring tooth.
- Finally, the manufacturers' recommendation: every 2 chains, replace the cassette. And, every 2 cassettes, replace the chainrings. This has not been proven for a mountain bike transmission transmission.
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MTB - Plateaux
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