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Old 05-03-18, 06:24 AM
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Location: New England
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Bikes: Brompton M6R, Specialized Tricross Comp, Ellsworth Isis, Dahon Speed P8

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Think I want to try a -22% with the 39T chainring for the 26-78" gi range... Can anyone advise a good 39T ring to buy, and do I need a specific bolt pattern for it?
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