The Speed Concept 2.5 2011 Triathlon Bike, whether you want to finish strong or finish first, Trek's triathlon bikes will add speed to your bike leg and leave some energy in the tank for the run. The Trek 2 Series offers an Alpha Aluminium version of the popular Trek 7 Series, which still retains the majority of the Kammtail aero advantage in the down tube, seat tube, seatstays and fork legs but comes with a more affordable price tag and more comfortable riding position. With the best aerodynamics, integration in its class the 2.5 Speed Concept has cleverly integrate electronics into its shape. Computer sensors create unwanted dirty air, but not if you build them seamlessly into the frame, the Speed Concept is the first triathlon bike to do this. on this road bike the air flow over the top tube and handlebars has been tested not onyl with front wind being taken into account but with every challenging crosswind against them as well. By optimising this combination of airflow it gives you the least air resistance, and consequently, the fastest speeds.