A turbocharger, comprising: a turbocharger housing; and a rotor being mounted for axial rotation within the turbocharger housing, the rotor including a shaft extending axially between a turbine wheel and a two-sided compressor wheel, the two-sided compressor wheel having a plurality of blades including a first set of compressor blades surrounding a first hub portion and a second set of compressor blades surrounding a second hub portion, wherein the first set of compressor blades defines a first inducer plane, wherein the second set of compressor blades defines a second inducer plane, and wherein the two-sided compressor wheel defines an active-wheel-portion extending from the first inducer plane to the second inducer plane; wherein the housing defines a diffuser for the compressor wheel, the diffuser including a first portion surrounding the first set of compressor blades, and the diffuser including a second portion surrounding the second set of compressor blades; wherein the housing defines a first inlet leading to the first inlet plane of the first set of compressor blades; wherein the housing defines a second inlet leading to the second inlet plane of the second set of compressor blades; wherein the first and second inlets respectively connect the first and second inlet planes directly to a single source of inlet air; wherein the trim of a set of compressor blades is defined as Trim = D 1, S 2 D 2 2 × 100 with D 1,S being the diameter of a shroud edge of the blades at the inducer, and D 2 being the diameter of the wheel at a root end of an exducer, where the hub edges meet the trailing edges of the blades; wherein the first set of compressor blades is characterized by a first wheel trim; and wherein the second set of compressor blades is characterized by a second wheel trim that is different than the first wheel trim. a turbocharger housing; and a rotor being mounted for axial rotation within the turbocharger housing, the rotor including a shaft extending axially between a turbine wheel and a two-sided compressor wheel, the two-sided compressor wheel having a plurality of blades including a first set of compressor blades surrounding a first hub portion and a second set of compressor blades surrounding a second hub portion, wherein the first set of compressor blades defines a first inducer plane, wherein the second set of compressor blades defines a second inducer plane, and wherein the two-sided compressor wheel defines an active-wheel-portion extending from the first inducer plane to the second inducer plane; wherein the housing defines a diffuser for the compressor wheel, the diffuser including a first portion surrounding the first set of compressor blades, and the diffuser including a second portion surrounding the second set of compressor blades; wherein the housing defines a first inlet leading to the first inlet plane of the first set of compressor blades; wherein the housing defines a second inlet leading to the second inlet plane of the second set of compressor blades; wherein the first and second inlets respectively connect the first and second inlet planes directly to a single source of inlet air; wherein the trim of a set of compressor blades is defined as Trim = D 1, S 2 D 2 2 × 100 with D 1,S being the diameter of a shroud edge of the blades at the inducer, and D 2 being the diameter of the wheel at a root end of an exducer, where the hub edges meet the trailing edges of the blades; wherein the first set of compressor blades is characterized by a first wheel trim; and wherein the second set of compressor blades is characterized by a second wheel trim that is different than the first wheel trim.