There is now an inventory type for when you're selling a virtual product. Not a physical bike, but a place on a tour / activity or event.
In this example, I've used BRM to run Shuttle rides so the inventory type I'm selling is TAE - meaning a place on the bus.
Here is what the TAE icon looks like in more detail:
In future we will create more custom behaviour for these virtual inventory types to make it easier to run your operation.