Shared mobility has the potential to contribute to the transition to a more sustainable mobility system. However, the environmental impacts and the extent of proliferation of the various shared mobility practices differ considerably. It is problematic that the most widespread practice—free-floating carsharing—shows the least environmental potential. Thus, the question arises as to why some shared mobility practices proliferate more readily than others. This paper studies this question from a practice theoretical perspective, focusing on how practices link or do not link with one another. It analyses how various shared mobility practices, as well as the practice of private car travel, connect to other practices via spatial-material and temporal links. The analysis explains why private car travel and, to a lesser degree, free-floating carsharing integrate relatively easily into everyday life, while other forms of shared mobility struggle to do so. This observation leads to the need for far-reaching interventions, both in the making of links of sustainable practices but also in the breaking of links of unsustainable practices. This paper scrutinizes this issue in an anticipatory and theory-based manner and offers suggestions on how to refine practice theoretical concepts regarding inter-practice connections.