Please note that we recommend double wheel tensioners for 15T and smaller rear sprockets. This is to ensure a healthy amount of chain wrap and help to eliminate the chance of the chain skipping. It is possible to fit these tensioners with sprockets under 15t, although that will require a setup that has a good amount of chain wrap and a small modification to the tensioner springs.Bending the tensioner springs is not covered under warranty. The springs only require a gentle curve to maintain suitable tension, therefore deliberately bending the springs to gain more tension (bending the springs can actually lead to a reduction in tension) or over-tensioning the springs will invalidate the warranty.
TartyBikes Ltd, Units 3-4, Club Street, Bamber Bridge, Preston, PR5 6FN