Answer: Eliminates most of the normal inventory that would need to be held in the bike stores, at the factory, and in various distribution centers spread around the world.
Explanation: A bike can be custom-built to the size, shape, and performance requirements of each customer.
The bike shops would be physically larger to accommodate for the 3-D printer to allow bikes to be made while the customer waits in-store.
The bike shops can be physically smaller as few bikes would need to be on display.