This classic pink Bike Cleaner has incredible cleaning power because it contains Nano Technology that breaks down dirt and grime on microscopic levels, while also caring for your bikeâs delicate finish. Muc-off's pink cleaner is biodegradable, free from acids, CFCâs and solvents, and itâs alkaline based so you can clean away with a guilt-free conscience. Itâs safe on all surfaces, and itâs even disc brake rotor and pad friendly.