Large v-belt

A large V-belt comprising:

• an endless belt body made of rubber and including an adhesive rubber layer stacked in a belt thickness direction;
• and
• a cord embedded in the adhesive rubber layer of the belt body and extending along a circumferential direction of the belt body while forming a helical pattern having a pitch in a belt width direction,
• the large V-belt having a belt thickness of 15 mm or more and a belt width of 10 mm or more at a center, in the belt thickness direction, of a cord embedded position,
• the belt body further including a reinforced rubber layer made of a rubber composition having a type A durometer hardness of 92 or more, the reinforced rubber layer being stacked on a belt inner side and/or a belt outer side of the adhesive rubber layer in the belt thickness direction,
• the rubber composition containing a rubber component, cellulose-based fine fibers, carbon black, and para-aramid short fibers,
• a content of the para-aramid short fibers in the rubber composition being 25 parts by mass or more and 40 parts by mass or less relative to 100 parts by mass of the rubber component,
• a sum of a content of the carbon black and the content of the para-aramid short fibers in the rubber composition being 50 parts by mass or more and 100 parts by mass or less relative to 100 parts by mass of the rubber component,
• the rubber composition being arranged such that a grain direction thereof corresponds to the belt width direction and a cross-grain direction thereof corresponds to a belt length direction,
• a storage normal modulus E′ of the rubber composition at 25° C. in the cross-grain direction being 80 MPa or more and 200 MPa or less, and
• a ratio of a storage normal modulus E′ of the rubber composition at 25° C. in the grain direction to the storage normal modulus E′ of the rubber composition at 25° C. in the cross-grain direction being 10 or more and 20 or less.