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The closest to that is the Sachs DD3 "dual drive" hubs that are a 3 speed IGH with a standard cassette mount, available in 8,9 or 10 speed cassette versions. According to this site the ratios in the hub are 0.73,1,1.36 giving 1.86 between high and low gears. That's wider than a double chainring setup but narrower than most triples (a 20/30/40T triple has a ...


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If you really want that wide a ratio, the widest ratio chainset combined with the widest ratio cassette commercially available would get you very close. There are crank sets that can take chain rings from 22 to 50 teeth (finding a front derailleur that could do this range might be hard), and an 11-40 cassette. Cross-chaining would be a bad thing given how ...



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