BMX is making its Olympic debut in Beijing this summer, and Nike is ready with some event-ready shoes that expertly blend style with performance. The Nike Dunk Gyrizo ($TBA), which "look like a Dunk, but act like Lance's cleat," are internally built like the cycling shoes Mr. Armstrong wears, with an inner plate that transfers power in the up and down strokes of the rider. (That's what she said.) The Dunk upper gets upgraded with an outsole with more grip, Kevlar lace and metal grommets, and a velcro strap for keeping laces out of spokes.