Bike Forums - Choosing an RD

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tansc

07-10-06 01:34 AM

Choosing an RD

Hiya

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

Cheers
SC

fmw	07-10-06 05:56 AM

Sure. It is the indexed shifter and cassette that need to match.

HillRider

07-10-06 06:23 AM

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.

TallRider

07-10-06 06:29 AM

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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