Birzman Chain Wear Indicator - 1-12 Speed Red Training test: an evaluation test

Training test: an evaluation test that helps you create month-long personalized indoor training programs

it does not contain Caffeine

SHIELD: A toric shield of Plutonite® in a rimless design for a fashion-forward style

Size:  27

14 g Black

Birzman Chain Wear Indicator - 1-12 Speed Red Training test: an evaluation testThe Birzman chain wear indicator tool measures wear and stretching on single to 12 speed chains, so that you know when its time to replace it. A worn chain causes poor shifting performance and reduces the service life of sprockets and chainrings by wearing down the teeth. Regular checking for chain wear and a timely chain replacement prevent costly premature replacement. 11 and 12 speed chains should not be stretched more than 0. 5%. When using