Abstract: Agricultural vehicle tire having tread (1) with bearing surface (10) on which main lugs (3) and shorter secondary lugs (3) are formed on each side of the equatorial mid-plane (XX?), each secondary lug (3) interposed between two main lugs (2). The main lugs (2) and secondary lugs (3) make up, in the radial direction, a lens (21, 31) of a first material, each lens (21, 31) surmounted by a second material extending to the contact face of the main lugs and the secondary lugs. The viscous modulus G?1 of the first material is at most 60% of the viscous modulus G?2 of the second material. The complex modulus G?1 of the first material differs from the complex modulus G?2 of the second material, the difference between these complex moduli being at most 30% of the complex modulus G?2 of the second material.

Abstract: Large tires, the tread of which has a mean volumetric void ratio over the entire tread of greater than 10%, comprise 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.

Abstract: Agricultural vehicle tire having tread (1) with bearing surface (10) on which main lugs (3) and shorter secondary lugs (3) are formed on each side of the equatorial mid-plane (XX?), each secondary lug (3) interposed between two main lugs (2). The main lugs (2) and secondary lugs (3) make up, in the radial direction, a lens (21, 31) of a first material, each lens (21, 31) surmounted by a second material extending to the contact face of the main lugs and the secondary lugs. The viscous modulus G?1 of the first material is at most 60% of the viscous modulus G?2 of the second material. The complex modulus G*1 of the first material differs from the complex modulus G*2 of the second material, the difference between these complex moduli being at most 30% of the complex modulus G*2 of the second material.

Abstract: The tire has a tread which is intended to come into contact with the ground and which comprises a plurality of lugs separated from one another by grooves. Each lug extends radially outwards, over a radial height H, from a bottom surface as far as a contact face. The grooves are made up of the portions of the bottom surface that separate the lugs. The tread comprises a rubber composition based on at least one synthetic elastomer which predominates by weight, this synthetic elastomer comprising at least one butadiene-styrene copolymer, SBR, the SBR having a content greater than or equal to 20 parts per hundred rubber, phr, a reinforcing filler predominantly comprising carbon black. The composition comprises an aromatic dicyclopentadiene plasticizing resin essentially comprising styrene, ethylene and dicyclopentadiene units, at a content ranging from 2 to 40 phr, the composition containing under 5 phr of another plasticizer.