Pattern for a tire surface

The tire has a plurality of radially outer rubber components defining a radially outer surface (S 1 ) exposed to fluids having a relative displacement with respect to the rotating tire. At least one radially outer component has projections, the projections being defined by first sides ( 2 ) and second sides ( 2′ ) of unequal length. The first sides ( 2 ) have a greater length, delimiting therebetween an angle ranging from 5° to 60° and forming at their intersection an apex (P). The projections protrude by a height (h) from the radially outer surface (S 1 ) from which said first and second sides originate, the height (h) ranging from 0.2 to 100 micrometers. In more than 75% of the projections, any plane tangent to the first side ( 2 ) of the projection cuts the radially outer surface (S 1 ) at an acute angle.