Maj. Christopher Tung pauses for a photo with his speed bicycle. Tung said the geometry and aerodynamics of the bike make it ‘really fast’. He has used this bicycle for the past few years. Handle bars are one of the main differences between a road bike and triathlon bike. Triathlon bikes have aerobars instead of regular handles. Triathlon bikes are also intended for riding on roads and use a thinner frame and tire for greater efficiency. (U.S. Army Reserve photo by Sgt. David Lietz)