He was named Swiss Sports Personality of the Year in 1982 and 1983. He was a racer of great speed, who participated both in road races as well as track cycling. On the road, he was victorious in numerous stages and criteriums.
He competed in the team pursuit event at the 1980 Summer Olympics.
In 1981, Freuler was riding for a personal sponsor, when the TI-Raleigh cycling team had problems to form a team for the 1981 Tour de France. The rules allowed for the Raleigh team to hire cyclists who were not riding for a cycling team, and Freuler was added to the Tour squad.
Because Freuler, as a still young professional and with contracts for a full winter season of Six Days coming up, his team leader Peter Post and Freuler agreed that Freuler, although capable of taking on mountain stages, had to leave the race before the Alps would be visited. After that he never started in the Tour again.
Track cycling Road bicycle racing.
World champion of points race in 1981, 1982, 1983, 1984, 1985, 1986, 1987, and 1989 World champion of Keirin in 1983 and 1985 European champion of sprint in 1981 21 six-day races from 1981 to 1994, with Patrick Sercu, Robert Dill-Bundi, Hans Känel, René Pijnen, Daniel Gisiger, Horst Schütz, Dietrich Thurau, Roman Hermann, Danny Clark, Olaf Ludwig, Remig Stumpf and lastly Carsten Wolf in 1994. Swiss champion of resistance in 1981, 1983, 1986, and 1987 Swiss champion of points race in 1981, 1986, 1989, 1990, 1991 and 1992 Swiss champion of individual pursuit in 1985.
