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Rear Mech Speed

carl_pcarl_p Posts: 989
edited May 2009 in Workshop
Can anyone tell me if an 8 speed Shimano 105 derailleur work with a Shimano 9 speed cassette and chain, or do the speed ratings have to be the same throughout?
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Cannondale Synapse
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Genesis Flyer Single Speed


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  • redveeredvee Posts: 11,921
    8 speed will work with 9, it did for me. I used an old 8speed 105 mech that was from the DT shifter era with a 105 9 speed STI set-up.
    I've added a signature to prove it is still possible.
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