This project investigated the usage of the Citibike bikeshare system in New York City. Through analysis of large-scale data on rider demographics and characteristics of individual rides, it was possible to explore how uptake of the Citibike system differs by demographic group. We tested for difference in ride length between male and female users. The study found a statistically significant different in mean ride length, with men taking longer rides than women on average during the test period June-July 2017. The finding is of policy interest given New York City's commitment to equal opportunities, gender empowerment and mobility for all, and may support the need for outreach and awareness campaigns aimed at narrowing the gender gap in Citibike usage.