Patent ID: 7497240

Claim:
A tire having a plurality of radially outer rubber components, the components defining a radially outer surface (S 1 ) of the tire and being exposed to fluids having a relative displacement with respect to the rotating tire, the tire comprising at least one radially outer component having projections, the projections being defined by first sides ( 2 ) and second sides ( 2 ′) of unequal length, the first sides ( 2 ) having the greater length, delimiting therebetween an angle α ranging from 5° to 60° and forming at their intersection an apex (P), which protrudes by a height (h) from the radially outer surface (S 1 ) from which said first and second sides originate, the second side ( 2 ′) forming with the outer surface (S 1 ) an undercut extending beneath the apex (P), and the height (h) ranging from 0.2 to 100 micrometers and in more than 75% of the projections, any plane tangent to the first side ( 2 ) of the projection cutting the radially outer surface (S 1 ) at an acute angle and wherein said at least one radially outer rubber component is a tread.