If you like biking when traveling to a new city, this will be convenient.
Bicycle rentals at points of entry (airports, train/bus stations) delivered to your accommodations. You just pick a bike and either have it delivered to your accommodations, or even ride it there. You can also reserve online in advance.
In some situations (putting the bike on the car), it’s useful if the front wheel and handlebar do not move.
Build a locking mechanism into the front wheel and handlebar. It will help when you need to pick up and move the whole bike and also deter thieves.
It’s not easy lifting the bikes on and of the car’s roof top rack.
Have a folding elastic track that can unfold on top of the car’s front and onto the ground. You guide the bike onto the track in front of the car and push it up the car front and onto the roof top rack.
It’s a bore to lock and unlock your bike, especially if you use it a lot.
Have sensors that activate when your bike is at rest and pressure on the wheels/tires is reduces (bike is being lifted.) or bike is in movement. When you park your bicycle, just turn on the system, and if someone tries to lift or move the bike, a loud alarm is activated.
People riding bikes can make extra money, and advertisers can have a new medium.
Mount a string of LED lights on both sides of a bicycle wheel’s spoke, connected to a controller and power source (battery or dynamo.). The controller will light up the individual LED lights based on the speed of the wheel to create the illusion of a message that can be read by people looking at the moving bike from both it sides.