Looking at a compressor wheel, the inducer is the "minor" diameter. For a turbine wheel, the inducer is the "major" diameter. The inducer, in either case, is where flow enters the wheel.

turbobygarrett.com

TurboMaster is a company devoted exclusively to the turbocharger's business since its foundation in 1980, i.e. more than 35 years of experience, knowledge and service backing us up, all of them available for your power needs. 
Distributoren der weltbesten Marken GARRETT, HOLSET, HITACHI und TIAL.