He took a few photos of my position on the bike and then got out this contraption that was sort of like a protractor from middle school math . This thing , however , calculated the angles of my arms and legs . The goal is to hit 90 degrees -- my arm - to - torso angle was closer to 105 ( this , he explained , was why my forearms were getting fatigued during my rides ) . He would move my seat , shift my aerobars and maneuver my post height , then compare angles with the protractor - like device .

Question: What may be the reason for this photo shoot ?
Answer: To sell a carTo sell a bikeTo sell a skateboardNone of the above choices .