|Intro||Professional Luxembourgian road bicycle racer|
|Was||Athlete Sport cyclist Cyclist Cyclo-cross cyclist|
|Birth||20 February 1922, Esch-sur-Alzette, Luxembourg|
|Death||6 December 2012, Pétange, Luxembourg (aged 90 years)|
Jean "Bim" Diederich (20 February 1922 – 6 December 2012) was a professional Luxembourgian road bicycle racer, with an impressive record in the Tour de France. Diederich was born in Esch-sur-Alzette, Luxembourg, and was active in competition from 1946 to 1954. He finished sixth in the road race at the 1947 Road World Championships. He had fourteen wins, including stage wins in the 1950 Tour de France (finishing in Menton), the 1951 Tour de France (from Reims to Ghent, leading the race solo over the Muur van Geraardsbergen before crossing the finish line, earning the nickname "Le Duc de Grammont" or "the Duke of Geraardsbergen"), and the 1952 Tour de France (into Namur). He wore the yellow jersey as leader of the general classification for three days during the 1951 Tour. He was the father-in-law of cyclist Lucien Didier, and the grandfather of cyclist Laurent Didier.
1947 2nd Overall Tour de Luxembourg 6th Road race, UCI Road World Championships 1949 1st Overall Tour de Luxembourg Athus 1950 Tour de France Winner stage 15 2nd Overall Tour de Luxembourg 1951 Tour de France Winner stage 2 Wearing yellow jersey for three days 2nd Overall Tour de Luxembourg 1952 Tour de France Winner stage 5 1st Tour de Lorraine