Book excerpt: The first full-length study of cycling activism through the lens of social movement theory, this book demonstrates that, despite tremendous differences, bike activism can be understood as a continuous and connected activity spanning a century and a half and across continents. With examples from street protest to institutional lobbying, it emphasises cycling’s current central importance to zero carbon transport futures, while showing that cycling activism is also not always about the bike or the cyclist, as successive generations of activists have used cycling to articulate different visions of freedom and autonomy. Moving from a consideration of social movement theory as a means to understand cycling activism, the author presents a series of case studies of collective action, organisations, networks and campaigns in order to illustrate and elaborate a theoretical model through which diverse campaigns and approaches to change can be understood. As such, Cycling Activism will appeal to those with interests in mobilisation for social change, mobility and transport studies, and social movement theory, as well as cycling studies.