Abstract - Cycling is a great alternative for urban mobility needs. It is cheap, sustainable, and does not contribute to congestion as much as other modes of transport. Despite these great benefits to urban life, cycling may still not meet the needs of the entire population equitably. Since cycling requires physical exertion, it may not be an adequate mode of transport for a significant part of the population. Thus, we test if the proportion of CitiBike users who are under 50 is greater or equal to the proportion of users over the age of 50. We find using a z-test that indeed the proportion of users under 50 is larger, accounting for a whopping 80% of the system.