However, the sprocket wear starts increasing even before the chain begins to jump over the sprocket teeth. The inspection of this chain elongation is made quick and easy with the Renold wear guide. In almost no time and directly at the chain it can be determined whether the chain should be replaced or not. Costs can be saved by avoiding prematurely worn-out sprockets, as well as on eliminating the need for the complicated and time consuming removal and re-installation of chains in order to test them in the conventional way.