As part of our patented crocodile-belt-tensioning-system our spanner washer easily helps adjusting the rear wheel and the belt tension. The configuration is simple: the rear wheel is positioned and the belt tensioned with the help of the spanner washer and an open-jaw wrench - and as a last step the axle is fixed with an Allen key.

Standard unit: 1 piece

For M6 cylinder screw - as spare part for our models Hektor, Siegfried, Siegfried Road and Viktor in the colours silver or black.

For 10 mm full axle - as spare part for ThinBikes with a 10 mm full axle.