Peaty's Foaming Drivetrain Degreaser is the ultimate bike specific, high strength foaming drivetrain degreaser. Our powerful biodegradable formula has been designed to be tough on grime for fast and powerful drivetrain degreasing, while remaining kind to the rest of your bike and the environment.   Application Apply liberally to the cassette while cycling the chain backwards, building up a thick layer of foam.. Apply directly to any other areas not already coated such as crank arms, derailleur bodies or jockey wheels.. If you have a bike stand, run through all of your gears several times to agitate the grime.. Agitate any stubborn areas where needed then leave to soak for two minutes.. Rinse off thoroughly with clean water.. Dry the chain using a clean cloth..