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How to determine which derailleur hanger will do the job on the lower RD that the mounting plate on the upper RD did ? There are so many… my frame has no
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5pc Bicycle gear rear derailleur hanger For XDS DE.8001 XDS SUNDANCE 500 600 700 XDS 800 mountain bike frame carbon MECH dropout|Bicycle Derailleur| - AliExpress
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