ABSTRACT The paper proposes that action research, not as a predefined set of methods but rather as a mode of research, should be considered a key asset in creating transformative knowledge on just cycling futures. I explain, firstly, why action-oriented, experimental, and participatory research should deploy the concept of prefigurative politics – the performing of not-yet cycling futures here and now – as a theoretical, methodological and practical resource to counter hegemonic, oppressive, essentialist and authoritarian mobility rationalities. Second, I argue why prefigurative action research is most applicable when involving diverse actors across cycling governance networks into a democratic social learning process. These arguments are developed by synthesising literatures from social movement studies and mobility and transport justice, and by providing examples of four social cycling innovations among a population often marginalised from transport policy and planning – children and young people. In conclusion, the paper proposes a model for conducting prefigurative action research on cycling.