How to optimise my stock

I want to know what is the best way of meeting demand. I provide a bike rental service, I have 100 customers that arrive at one station every ten minutes in the morning, and they rent a bicycle each to get to one of 10 destinations spread evenly in a radius of 100m. What is the most efficient way of meeting demand? Should I provide a full stock of bicycles to meet the full demand at the station and let the customers bring back their rental on their return journey or should I provide a smaller stock, e.g., 10% and then collect the used stock at their destinations and bring them back to the station to meet demand?