An internally ventilated brake disc, comprising: at least two brake disc plates (210, 220) arranged perpendicular to an axis of rotation of the brake disc, the at least two brake disc plates (210, 220) including a first plate portion having a first friction ring and a radially inner region connected to the first friction ring, and a second plate portion having a second friction ring; a plurality of cooling vanes forming cooling channels between adjacent vanes, the plurality of cooling vanes being located between the first and second disc plate portions and arranged to guide cooling air from the radially inner region to a radially outward region of the first friction ring; and axle hub mounting features at the radially inner region of the first disc plate portion configured to cooperate with corresponding features of an axle hub when the brake disc is in an installed position on the axle hub, wherein one of the first friction ring and the second friction ring has parallel inner and outer surfaces, characterized in that an axial thickness of the first friction ring in a direction parallel to the brake disc rotation axis increases in a direction from the radially outer region to a radially inner region of the first friction ring in a linear manner, wherein the first friction ring and the second friction ring have a difference in mass and wherein a sum of a mass of the radially inner region of the first disc plate portion and the mass of the first friction ring is greater than a mass of the second disc plate portion by an amount such that during a braking event in which the brake disc is installed on a vehicle a temperature difference between the second disc plate portion and the first disc plate portion is smaller than a temperature difference that would occur during the braking event between friction rings having the same axial thickness as the second friction ring. at least two brake disc plates (210, 220) arranged perpendicular to an axis of rotation of the brake disc, the at least two brake disc plates (210, 220) including a first plate portion having a first friction ring and a radially inner region connected to the first friction ring, and a second plate portion having a second friction ring; a first plate portion having a first friction ring and a radially inner region connected to the first friction ring, and a second plate portion having a second friction ring; a plurality of cooling vanes forming cooling channels between adjacent vanes, the plurality of cooling vanes being located between the first and second disc plate portions and arranged to guide cooling air from the radially inner region to a radially outward region of the first friction ring; and axle hub mounting features at the radially inner region of the first disc plate portion configured to cooperate with corresponding features of an axle hub when the brake disc is in an installed position on the axle hub, wherein one of the first friction ring and the second friction ring has parallel inner and outer surfaces, characterized in that an axial thickness of the first friction ring in a direction parallel to the brake disc rotation axis increases in a direction from the radially outer region to a radially inner region of the first friction ring in a linear manner, wherein the first friction ring and the second friction ring have a difference in mass and wherein a sum of a mass of the radially inner region of the first disc plate portion and the mass of the first friction ring is greater than a mass of the second disc plate portion by an amount such that during a braking event in which the brake disc is installed on a vehicle a temperature difference between the second disc plate portion and the first disc plate portion is smaller than a temperature difference that would occur during the braking event between friction rings having the same axial thickness as the second friction ring. one of the first friction ring and the second friction ring has parallel inner and outer surfaces, characterized in that an axial thickness of the first friction ring in a direction parallel to the brake disc rotation axis increases in a direction from the radially outer region to a radially inner region of the first friction ring in a linear manner, wherein the first friction ring and the second friction ring have a difference in mass and wherein a sum of a mass of the radially inner region of the first disc plate portion and the mass of the first friction ring is greater than a mass of the second disc plate portion by an amount such that during a braking event in which the brake disc is installed on a vehicle a temperature difference between the second disc plate portion and the first disc plate portion is smaller than a temperature difference that would occur during the braking event between friction rings having the same axial thickness as the second friction ring.