Dura Ace 9000 11 - RD

[bob59]

Shimano lists the DA-9000 Short Cage RD - as 28T max on the rear. Can you safely go up to a 30 or even better a 32 tooth with a longer chain?

50/34 in the front.


If not can I run a Ultegra 8000 medium RD - with the DA 9000 levers.....I assume all Shimano 11spd works nicely together but what do I know.

Thanks

[saab2000]

I have done this but you must be very careful to not cross-chain the big-big combo. This is a short cage derailleur and won’t handle it. Also, the chain might be a bit loose in the small-small range. Otherwise it works fine. Just be careful to avoid that 50x32 combo.

[echappist]

Originally Posted by saab2000

I have done this but you must be very careful to not cross-chain the big-big combo. This is a short cage derailleur and won’t handle it. Also, the chain might be a bit loose in the small-small range. Otherwise it works fine. Just be careful to avoid that 50x32 combo.

+1

Almost certain to work with a 14t difference on the front; slightly dicier for a 16t difference.

50x32t and 52x32t (when running 52/36 front) are the situations to avoid.

[Look585]

I routinely run DA9000 with 32 or even 34t cassettes. Definitely be careful to cut the chain on the long side and wind in the B-tension screw as far as needed to keep the upper jockey wheel off the 34t. A bit of droop in the "small-small" is fine (and much better than not enough chain to get up to the "big-big").

[skouri1]

i have run equivalent ultegra short cage with 32, but its going to work better with medium cage. I would step down to ultegra and get a medium personally. get full range of gears and derailleur that can take up slack effectively.

[dr.dre]

It depends on your frame, some are more possible than others, and no easy way to be sure without just installing and trying.

But I have run DA 9000 RD with and 11-30 cassette for a trip, without any problems. You will probably have to tighten the B-tension more, and might need a longer chain.

Shimano is famously conservative with capacity ratings, chances are good it will work for you.

[Jere]

Originally Posted by bob59

Shimano lists the DA-9000 Short Cage RD - as 28T max on the rear. Can you safely go up to a 30 or even better a 32 tooth with a longer chain?

50/34 in the front.


If not can I run a Ultegra 8000 medium RD - with the DA 9000 levers.....I assume all Shimano 11spd works nicely together but what do I know.

Thanks

I’ve been running 11/34 for lots of miles with Di2.
Chain length and B screw are critical
I use all the gears.
Cervelo R5 Disc.

[skouri1]

you can maybe do it, as others above have mentioned, but a short cage derailleur will not effectively take up slack in chain like a midcage will. it's a compromise.