Marcel Kittel is best known for absolute domination at the Tour de France, winning 14 stages, 2 of which on the famous Champs-Élysées. A sprinter with almost 100 race victories to his name, Marcel rode to many highs and lows during his career and surprised everyone when he announced his retirement at just 31 years old. What was it that made the German powerhouse, famous for his stature and the horsepower to match, make the decision to leave when he was at the top of his game? Bernie Eisel is in Switzerland to find out.