Israeli designer Ofir Yadan has created a removable cargo bay for bicycles dubbed the S-Cargo. The S-cargo is designed for those who do everything on their bikes. Unlike a normal cargo bay for a bike, this one can be removed whenever you like. The design acts as a replacement for the front wheel, allowing you to quickly install and uninstall it.
Once you've reached your destination, the S-cargo can be detached and used as a dolly. Ofir has only designed the backpack attachment at the moment, but he is working on other mounts, including a box and child seat. There are no plans to put S-cargo into production, although the project is still being refined and worked on.