Degreasers are intended for drivetrains, but they can be a bit too harsh for delicate carbon and paint finishes. That's where WD-40's Foaming Bike Wash comes into play. Its suds are soft and won't harm your bike's luster. Its biodegradable formula is safe for plastic, carbon fiber, titanium, aluminum, steel, and rubber. The WD-40 Foaming Bike Wash comes in a one litter bottle.