Her sunglasses are mirrored, reflecting a sea of Lycra-clad kids as they rally around the start corral with her. Absentmindedly, she pushes the white frames up and tighter to her face, wedging them in securely under her pink helmet. For a brief moment, she chews at the corner of her lip and glances around. She's waiting to sign in—to take her pink, gummy-bear decaled bike through the gear check—and get this party started. It's Stage One of the European Junior Cycling Tour in Assen, Netherlands, and nine-year-old Ruby Isaac is about to throw down in the Individual Time Trial.