24 year old inventor Dominic Hargreaves has designed and built a fully-functional bike that folds up to the size of the bike's wheels. Check out a video and a pic of it folded up below:
"I couldn't find a folding bicycle I liked...I wanted something that could take a bit of punishment and that you could have fun with. So I made one myself."
Dominic has been in contact with various manufacturers and hopes to get his collapsible bike into production soon.