Rubber composition including a specific hydrocarbon resin

1. A tire comprising a rubber composition present in all or part of the tread of the tire, the rubber composition being based on:

at least one elastomer;

a reinforcing filler;

a crosslinking system; and

an optionally hydrogenated hydrocarbon-based resin, predominantly composed of units selected from the group consisting of cyclopentadiene, dicyclopentadiene, methylcyclopentadiene and mixtures thereof, the hydrocarbon-based resin having an average molecular weight Mz of less than 2000 g/mol and a glass transition temperature Tg, expressed in ° C., such that Tg≥ 80−2*(% HA), wherein % HA represents the content of aromatic protons of the hydrocarbon-based resin,

wherein the rubber composition comprises 100 phr of the at least one elastomer, the at least one elastomer having a Tg of between −80° C. and −110° C. and being an essentially unsaturated diene elastomer selected from the group consisting of polybutadienes, copolymers of butadiene and styrene, and mixtures thereof,

wherein the content of the hydrocarbon-based resin is within a range extending from 40 to 115 phr, and

wherein the reinforcing filler is a combination of silica and carbon black, and a content of the reinforcing filler is present within a range extending from 40 to 160 phr, the silica being present in a content within a range extending from 40 to 150 phr.

2. The tire according to claim 1 , wherein said hydrocarbon-based resin has an Mz of less than 1500 g/mol.

3. The tire according to claim 1 , wherein said hydrocarbon-based resin has a glass transition temperature Tg, expressed in ° C., such that Tg≥85−2*(% HA).

4. The tire according to claim 1 , wherein said hydrocarbon-based resin has a polydispersity index PI of less than 1.7.

5. The tire according to claim 4 , wherein said hydrocarbon-based resin has a polydispersity index PI of less than 1.6.

6. The tire according claim 1 , wherein said hydrocarbon-based resin has a content of aromatic protons of less than 50%.

7. The tire according to claim 6 , wherein said hydrocarbon-based resin has a content of aromatic protons within a range extending from 0% to 20%.

8. The tire according to claim 7 , wherein said hydrocarbon-based resin has a content of aromatic protons within a range extending from 0% to 15%.

9. The tire according to claim 8 , wherein said hydrocarbon-based resin has a content of aromatic protons of less than 5%.

10. The tire according to claim 9 , wherein said hydrocarbon-based resin has a content of aromatic protons within a range extending from 0% to 4%.

11. The tire according to claim 10 , wherein said hydrocarbon-based resin has a content of aromatic protons within a range extending from 0% to 2%.

12. The tire according to claim 11 , wherein said hydrocarbon-based resin has a content of aromatic protons of 0%.

13. The tire according to claim 7 , wherein said hydrocarbon-based resin has a content of aromatic protons within a range extending from 3% to 15%.

14. The tire according to claim 13 , wherein said hydrocarbon-based resin has a content of aromatic protons within a range extending from 5% to 10%.

15. The tire according to claim 1 , wherein said hydrocarbon-based resin has a content of ethylenic protons of less than 0.5%.

16. The tire according to claim 15 , wherein said hydrocarbon-based resin has a content of ethylenic protons of less than 0.1%.

17. The tire according to claim 15 , wherein said hydrocarbon-based resin does not comprise any ethylenic units.

18. The tire according to claim 1 , wherein the at least one elastomer predominantly comprises an elastomer having a glass transition temperature Tg of between −90° C. and −110° C.

19. The tire according to claim 1 , wherein the content of said hydrocarbon-based resin is within a range extending from 25 to 120 phr.

20. The tire according to claim 19 , wherein the content of said hydrocarbon-based resin is within a range extending from 40 to 115 phr.