I’ve always love riding a bike because it’s exhilarating and fun. It’s also a good exercise to warm up your cardio and even load up some groceries on your way home. But, you’ve seen them all. They are all made up of metal iron parts. The problem is it’s heavy and you can’t bring it anywhere where you can’t ride it. A better approach is to use plastics as its material. Plastics are durable nowadays and very light. You can even use colored plastics that light up at night. You can make it modular where you can just break it apart into smaller bits (3D printed?) Even an electric one?
Anyway, a good idea which I hope will be put to good use.