Shimano TL-CN42 Chain Wear Indicator Tool Replace Images With a concave platform and

With a concave platform and an easy clipless system

Built in crimper

To find the correct bearing

Helps prevent further damage in crashes

Perfect for mechs

Shimano TL-CN42 Chain Wear Indicator Tool Replace Images With a concave platform andThe Shimano TL CN42 Chain Wear Indicator Tool is a must have in your tool box. This tool is easy to use and understand so there'll be no question when your chain is due for replacement. Who's this item for: Workshop mechanics and home enthusiasts. Chain compatibility: This will work with 7 12 speed chains. How does it work: There are pictograph instruction on the side of the TL CN42. The two steps are as follows: Drop the 'split section' labeled with