I have seen these before but this one is really well made.
Chainless bicycle design
Checkout these cool gadgets...
Related Posts
Free Energy – No Fuel Magnetic Motor
4-D Printing – Self-Assembled Design
Vending Machine Actually Makes Your Pizza Fresh!
You Can Feel These Plasma Holograms Made With Femtosecond Lasers
This improbable membrane can trap flies in a jar—and odor in a toilet
