Pneumatic vehicle tire with radial ply carcass and tread member composed of a base layer situated closer to the tire axis and a cap layer arranged on top thereof

A pneumatic tire comprising:

• a radial ply carcass defining lateral regions, two shoulder regions, a crown region and a tire axis defining the axis of rotation of the tire;
• two side walls each covering a respective one of said lateral regions of said radial ply carcass;
• a tread member covering said crown region of said carcass and defining a roadway-contacting portion;
• said tread member comprising a base layer positioned closer to said tire axis defining the axis of rotation of the tire and a cap layer arranged on top of said base layer;
• said cap layer being profiled and solely constituting said roadway-contacting portion of the tread member during normal tire operation;
• said base layer forming a trough accommodating said cap layer and at least partially encasing the cap layer;
• said trough being bounded by two trough shoulders each one of which bounds a related one of said two shoulder regions of the tire adjacent the cap layer;
• said trough shoulders formed by said base layer separating said cap layer form the shoulder regions of the tire;
• said base layer being formed of a predetermined caoutchouc mixture;
• said tire shoulder regions being formed by said predetermined caoutchouc mixture forming said base layer;
• and
• a belt comprising at least one rubberized cord play embedded between said tread member and said crown region of said carcass.