[photo via varibike]
Remember as a kid when you tried patting your head whilst rubbing your belly? Well there's something about the Varibike that reminds us of this physical conundrum.
Invented by cyclist Martin Kraiss of Ulm, Germany the bike allows the rider to use their hands as well as their feet to pedal which is said to increase speeds by 31% over your standard bicycle.
Here's Martin showing us how and making it look pretty simple:
Maybe it's not much of a conundrum? Interested? Head on over to Martin's place.
