Anyone running XT or XTR with Dura Ace 9000/Ultegra 6800

[firerescuefin]

New take on an old question. Know that 10's and 11's are not cross compatible (MTB and Road Groups do not work together)....and that a 9 speed XT would work with 10's road stuff. Does the 9 speed MTB derailleurs work with current Shimano 11s' road. Anyone here running it on their adventure bikes?

[Mr_Gimby]

I assume you are talking about MTB 9s derailleurs with road 11s shifters--I don't think there is any cross compatibility 10/11. The cable pull ratios are different. It might accidentally align somewhat, but I really doubt it.

[firerescuefin]

I assume you are talking about MTB 9s derailleurs with road 11s shifters--I don't think there is any cross compatibility 10/11. The cable pull ratios are different. It might accidentally align somewhat, but I really doubt it.

Pretty well established that the 9's Shimano MTB Derailleurs play well with the 10's road groups. The Dynasys 10s MTB der does not.

[kramnnim]

According to Zinn...

"Shimano’s mechanical road 11-speed cable stroke is a road version of 10-speed Dynasys for mountain bikes"

[zennmotion]

If you didn't already notice, 5800 rear derailleurs have a medium cage option with an official max capacity of 32t. My guess would be that these could stretch to 34t with the B screw properly adjusted without an issue on most frames.

[firerescuefin]

If you didn't already notice, 5800 rear derailleurs have a medium cage option with an official max capacity of 32t. My guess would be that these could stretch to 34t with the B screw properly adjusted without an issue on most frames.

Yeah...and the Ultegra 6800 comes in a medium cage as well that accommodates a 32. Part of me wonders if the MTB would be a little more robust. More than likely, it's me trying to overthink the issue. :help:

[oldpotatoe]

New take on an old question. Know that 10's and 11's are not cross compatible (MTB and Road Groups do not work together)....and that a 9 speed XT would work with 10's road stuff. Does the 9 speed MTB derailleurs work with current Shimano 11s' road. Anyone here running it on their adventure bikes?

No. BUT shimano 10s MTB 'might'.