Turbocharger for road vehicles

A turbocharger for road vehicles comprising a turbine comprising, in turn, a first containing casing and a first impeller engaged in the first containing casing in a rotary manner;

• a compressor comprising, in turn, a second containing casing and a second impeller engaged in the second containing casing in a rotary manner;
• a transmission shaft coupled to said first and second impellers in an angularly fixed manner;
• and at least one support bearing mounted between said first and second impellers and engaged by the transmission shaft in a rotary manner;
• the second impeller being provided with a plurality of blades and being axially delimited by an end face facing the support bearing and the turbine;
• and characterized by the second impeller being provided with at least one tooth, which protrudes from the end face so as to generate a pressure drop in an air flow fed between the end face and the second containing casing.