Mobility hubs are a promising concept that has been gaining increased attention. Mobility hubs, a place where several (shared) modalities are combined, are seen as an enabler of shared mobility. Shared mobility and mobility hubs could therefore provide attractive alternatives for private vehicles and contribute to municipal policy goals. Like to create more accessible and liveable cities. This study explores the influencing factors for the usage and effects of neighbourhood mobility hubs through an ex-post evaluation of some already existing neighbourhood mobility hubs in the Netherlands. This is examined in a qualitative manner by employing a literature review, applying qualitative system dynamics methodology and conducting semi-structured interviews. A causal loop diagram is constructed that visualises the complexity of mobility hubs and shows the various factors and relations that influence the usage and effects of mobility hubs. The diagram shows that while there is potential, there is also still uncertainty about the precise effects (such as private car usage and ownership), as they may be either positive or negative. The research has contributed to filling the scientific gap on (neighbourhood) mobility hubs, and by mapping influencing factors and effects, provided a framework for further future evaluation of mobility hubs.