Helmut Trettwer (born 29 September 1983) is a German former racing cyclist. He rode for in the men's team time trial event at the 2018 UCI Road World Championships.
Major results 2014 3rd Harlem Skyscraper Classic 2016 1st Mountains classification, Okolo Slovenska 3rd 3rd 7th Grand Prix Poland 2017 8th Croatia–Slovenia 2018 3rd 2019 3rd
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