From the article: > The same regression applied to Citi Bikes shows no such slowdown over time, in fact Citi Bikes got slightly faster. I suspect this is main

From the article: > The same regression applied to Citi Bikes shows no such slowdown over time, in fact Citi Bikes got slightly faster. I suspect this is mainly due to better bikes. I've been a yearly subscriber to Citibike since the very beginning - and I can attest that the quality of the system and the bikes has improved tremendously since inception. Quality of the bikes is judged in part by their durability and sturdiness of individual items - but also the gearing. The newest bikes have the NuVinci continuous variable gear system - which is amazing to use but also allows you to get into a lot higher gear than the original bikes.