Var Chain Wear Indictor 

A worn chain makes poor shifting and will slip over the cog teeth

Premature wear of chainrings and sprockets may happen

Features two gauges for checking out chain stretch :

a/ +0,075 per link : chain to be replaced quickly in order to avoid sprockets replacement

b/ +0,10 per link : chain and sprockets to be replaced at once, chainrings may be worn

Stainless steel with high precision cut