Rubber composition for a large-sized tire

A tire provided with a tread, of which a mean volumetric void ratio over the entire tread is greater than 10%, the tire comprising a composition based on at least one diene elastomer, on a vulcanization system, and from 0.10 to 1 phr of at least one organic polysulfide,

• wherein the at least one organic polysulfide is an aromatic polysulfide corresponding to general formula (I):
• in which:
• R3 to R11, which may be identical or different, represent a hydrogen atom, an —OH or —O−M+ radical, or a saturated or unsaturated carbon-based chain containing from 1 to 20 carbon atoms, or a group —OR12, with R12 being an alkyl, arylalkyl, acyl, carboalkoxy, alkyl ether, silyl, or alkylsilyl radical, comprising from 1 to 20 carbon atoms,
• M represents an alkali or alkaline-earth metal,
• n and n′, which may be identical or different, each represent an integer greater than or equal to 1 and less than or equal to 8,
• p is an integer from 0 to 50, and
• A is a nitrogen atom, a single bond, or a saturated or unsaturated carbon-based chain of 1 to 20 carbon atoms.