TREAD FOR TIRE

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Tire tread comprising a rubber composition based on at least a diene elastomer, a nonblack reinforcing filler, in particular inorganic filler, and a coupling agent providing the bonding between the diene elastomer and said filler, said composition being characterized in that it additionally comprises a prophoto-oxidizing agent and optionally carbon black at a level of less than 5 phr (parts by weight per hundred parts of elastomer). The prophoto-oxidizing agent is in particular a photo-initiator of radical or cationic type, which may or may not be activated by the presence of a photosensitizer. The tires comprising such a tread exhibit, after photo-oxidation (exposure to UV-visible radiation) of said tread, a significant increase in the grip on a wet road.