Wikimedia Commons has media related to Locomotives by wheel arrangement.
Locomotives (particularly modern traction types, e.g. diesel, electric, gas, or petrol locomotives) can be divided according to their wheel arrangement using the UIC classification system. See wheel arrangement, UIC classification, Whyte notation and AAR wheel arrangement.
Sub-categories in this section include articles about different classes of locomotive with the same wheel configuration. Wheel numbered articles provide overall info for trains of that type.