LAS VEGAS - Tired of walking? An American inventor has designed a pair of motorised shoes. The battery powered high-tech footware called “spnKiX” resemble a cross between a ski boot and a roller skate with oversized wheels and are among the gadgets on display at the Consumer Electronics Show (CES) in Las Vegas. A user straps the motorised skates on to their shoes and away they go, gliding smoothly along at speeds of up to 10 miles per hour (16 kilometers per hour). The futuristic shoes are the brainchild of Peter Treadway, a Los Angeles-based industrial designer.