Hope shifter bike cleanermany cleaning products contain silicon polish or other additives which have a detrimental effect on disc brakes problems caused range from squealing to total loss of power hope realised that the only way to stop these problems would be to produce their own range of cleaners shifter is specially formulated by hope to clean even the hardest grime and yet still be gentle enough not to damage your paintwork carbon anodised aluminium or brakes features contains no sodiu