I'm sure that teenager is a bike racer. We have a few of those boys riding fast with our club Team Velocity in Fullerton, CA. Plus, they are going unbelievably fast on their junior gearing (smaller cogs for safety reasons per junior bike league rules) and 650cc wheels
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2012 Specialized Amira Elite, upgraded carbon handle bars, Jett saddle 143mm switched to 145mm 2012 Selle Italia Max SLR Gel Flow saddle
2010 Santa Cruz Juliana with R kit and Crampon pedals
2011 Specialized Ariel Sport,suspension post,Serfas Rx Women's Microfiber saddle (sold)