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After reading about the superiority of the rare Simplex SLJ6600 derailleur, I want to know if it will be an easy swap on my 1980 Motobecane Le Champion, which came with and has the Campagnolo Nuovo Record. Will it be easy or, will I have different sized French threads to convert from the Italian ones this bike seems to have in the derailleur area? History shows and I can confirm, the Nuovo Record was not the easiest shifting derailleur on this Motobecane, and I heard the Simplex model above was about as good as it got! I look forward to word from you.

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