This paper reviews available research on the safety impacts associated with the growth in bike share use. In the last 20 years the global fleet of dock-based and dockless bike share systems has grown to well over 4 500 000; making bike share one of the fastest growing modes of transport. This rapid increase in popularity has made bike safety a priority for policy makers and calls for a framework where bike share crash data is collected consistently to ensure safety risks can be identified and reduced, in order to encourage more sustainable urban mobility.