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Which Shimano product is compatible with the RD-CT20 rear derailleur?
What are the recommended chain and bottom bracket for the RD-CT20 derailleur?
What is the recommended freewheel tooth combination for the RD-CT20 derailleur?
How many sprockets does the RD-CT20 derailleur accommodate?
What is the total capacity of the RD-CT20 derailleur?
What are the largest and smallest sprocket sizes compatible with the RD-CT20 derailleur?
