Originally Posted by
msantiago1
Will an XTR Shadow Rear Derailleur work with my Dura Ace shifters? I have a cross bike and I need 30 in the rear. My knees and legs are getting old and it would really help me climb some steep hills in Marin. TIA. Mike
A 9-speed XTR Shadow would. A 10-speed XTR Shadow wouldn't. In the bigger picture, I recommend an Ultegra RD-6700
A for your purpose instead. It's compatible with 30-tooth cassettes and will track the cassette more closely than a Shadow:
http://www.aebike.com/Ultegra-6700-A_c_14862.html