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Choosing an RD

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Old 07-10-06, 01:34 AM
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Choosing an RD

Hiya

Is it possible to use an 8 Speed RD on a 7 speed cassette?

Cheers
SC
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Old 07-10-06, 05:56 AM
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Sure. It is the indexed shifter and cassette that need to match.
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Old 07-10-06, 06:23 AM
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Mandatory disclaimer: If the 8-speed RD is a Dura Ace you have to do some cable attachment rerouting to make it work. If the RD is any other model, you are fine as is.
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Old 07-10-06, 06:29 AM
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Rear deraillers don't have "speeds", they have cable-pull ratio. And all of Shimano's rear deraillers since the first indexed shifting have the same cable-pull ratio. Except for pre-9-speed Dura-Ace, as HillRider noted.
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