Many of the city’s rentable bikes have been removed from the streets for upgrades needed to help reduce theft, the latest setback for the nearly year-old bike share program that has not expanded as quickly as projected.

Multiple posts from the Baltimore Bike Share on social media over the last few weeks state that bikes are in short supply as the unspecified upgrades take place. On Sept. 1, the bike share Twitter account responded to a user asking why they weren’t seeing as many bikes out on racks…