Please see photo for detailed specifications.
We ship within the USA and International.
The Third Eye® ChainWatcher (01). This is not a mirror. The ChainWatcher was invented out of necessity. Most bicycles today should have a triple chainring set up. Even the strongest riders need low gearing some times. The ChainWatcher prevents the chain from coming off, on the inside, when shifting to a small inner chainring. Once installed on your bike, you will never lose your chain on the inside again








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