Shimano TL-CN24 is a chain gauge tool designed specifically to help cyclists check the width of inner links and the protrusion of connecting pins on IG, HG, and UG chains. This tool is essential for ensuring that your chain is properly connected and functioning optimally.

The TL-CN24 features a precision-machined gauge that allows you to accurately measure the width of the inner link, ensuring that it meets Shimano's specifications. Additionally, the tool includes a built-in protrusion checker, which enables you to verify that the connecting pin is protruding from the outer link by the correct amount (0.2 mm or more). This is crucial for ensuring that the chain is securely connected and will not come apart during use.