The Unior Pro Chain Wear Indicator is a top quality chain wear checker. It is slimline, compact and easy to use. This chain checker is made to last and is strong and durable enough to use in a bicycle workshop. Useful for the man in the street, or for the professional mechanic. 

How to use the tool

To alleviate poor shifting and uneven drive train wear, most manufacturers recommend chain replacement at or before 0,6% stretch. Now you can quickly and accurately determine the wear and stretch of any chain. Simply insert the chain checker`s pins into two links, press the swing arm gauge tight, and then check the gauge window for an accurate reading.