[header] How to keep tires black [title] Rinse off caked-on dirt on your tires using a hose. [step] If you don't have a hose at home, go to a local carwash and use theirs. Spray down the surface of all your tires. 
If you notice any tough dirt spots, move the hose closer to the tire so the stream of water is more powerful. [title] Spray the surface of your tires with a cleaner.