As for the people who say rent them, they are definitely not cyclists. They don;t know the joy of riding. How would people get to a bicycle shop from the ship anyway? Probably too far to walk and not your own bike that fits you perfectly.Exactly!
We planned to rent bikes on a recent stop in Bonaire; the owner of the company had confirmed - via email - that he would have two bikes available for us on arrival. It took us half the day to finally track him down, at which point he admitted that he had totally forgotten about the reservation, he was too busy, and in any case by then it was too late for us to venture away from town.
It may sound like a solution, but renting is rarely an acceptable substitute for one's own bike.