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XO 9spd twist shifter with XT RD?
can I take a new XT RD (came off a 10spd) and use it with an XO twist shifter (9spd bike)?
isn't it the shifter that determines whether 9 or 10 spd compatible?
No. The SRAM and Shimano parts are not compatible in the first place.
Originally Posted by Oceanic 6
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The trouble with common sense is it is no longer common
You can't use the X0 shifter, but Sram have made a Shimano compatible version called the Attack, it's not compatible with the new 10 speed stuff.