Our Variochain upper chain tensioner pulls the chain downwards instead of pushing it upwards. This makes it possible to use one chain with a greater combination of sprockets.
Therefore the necessity of using worn out chains with some sprocket combinations is a thing of the past.
For this tensioner we use a rugged, wear resistant and friction reduced synthetic material, which is securely bolted onto a CNC machined mounting plate.
V2: The holes for the screws are now sleeved so the plastic does not give way when tightened stronger than it should. The screws also get secured by Nordlock shims so no bolt adhesive needs to be used when refitted. (Nordlock recommends to use new ones each time, but we made good experience when using them twice).