Bicycle hub locking mechanism and parking system

A bicycle sharing system, comprising:

• a stand including:
• at least one support member defining at least one parking space and having a pair of opposing side walls;
• at least one lock attached to one of the side walls, the lock comprising:
• a body configured to engage the one of the side walls and having a recess formed through a vertically extending wall thereof;
• and
• a pinning mechanism extending into the recess and moveable between a locked position and an unlocked position;
• wherein the recess and the pinning mechanism are configured to be proximately aligned with an engagement member of a bicycle so that the bicycle can be selectively secured relative to the support member when the pinning mechanism is in the locked position and the bicycle can be removed from the support member only when the pinning mechanism is in the unlocked position;
• and
• the pinning mechanism cooperates with a rotatable arm that directly interferes with at least a portion of the engagement member of the bicycle, the arm being rotatable in either direction when the pin is in the unlocked position and rotatable in only one direction when the pin is in the locked position;
• and
• a bicycle including:
• the engagement member extending from a fork of the bicycle that is configured to engage the at least one lock.