Rim for vehicle wheel

A wheel rim, said rim comprising:

• an annular body including a central annular portion, two peripheral annular portions and two intermediate annular portions,
• said central annular portion extending around an axis and being configured for arrangement around a wheel hub,
• said two peripheral annular portions being located on two sides that are axially opposite said central annular portion, each peripheral annular portion being more distant from said axis than said central annular portion and being configured for coupling with a bead of a tyre,
• each intermediate annular portion being arranged to join said central annular portion to a respective peripheral annular portion, each intermediate annular portion including:
• a tilted wall;
• a central connecting wall that joins said tilted wall to said central annular portion;
• and
• a peripheral connecting wall that joins said tilted wall to the respective peripheral annular portion, said peripheral connecting wall being more distant from said axis than said central connecting wall, said tilted wall defining a frustoconical surface facing radially outward relative to said axis, wherein:
• said frustoconical surface of said tilted wall forms an angle α with a plane that is perpendicular to said axis and said central connecting wall comprises an external convex annular surface facing radially outwards and connected on one side to said frustoconical surface of said tilted wall and on one axially opposite side to said central annular portion;
• said angle α is included in a range α=50°+4°,
• said tilted wall has a thickness S2
• said peripheral connecting wall defines an external frustoconical surface facing radially outwards and being connected to said external frustoconical surface of said tilted wall by means of an annular connecting surface with a radius of curvature R2, being 1.5*S2<R2<2.5*S2, and
• said frustoconical surface of said peripheral connecting wall forms an angle β with a direction parallel to said axis, such that angle β=5°±3°.