Murtfeldt Spann-Box® systems generally have a coloured scale. This enables you to determine the tensioning state of the chain at a glance. The display is as easy to understand as possible:
Green
The chain tensioner is working in the 'green range'. The tensioning force is providing an ideal, smooth running movement.
Yellow
The tensioning force is not ideal but is still sufficient.
Red
The chain tensioner needs to be adjusted. The tensioning force on the chain is too low for a smooth and reliable running movement.
The chain has to be replaced if it is not possible to sufficiently adjust the chain tensioner using any of the available adjustment options.
