Ultegra chainrings....

Discuss light weight issues concerning road bikes & parts.
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TonyM
Posts: 3008
Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Hi,

Is it possible to use the Ultegra R8000 chainrings on a FC-R9100 Dura Ace crankset?

Is it possible to use a 34/46 combo for the R8000 instead of the 36/46 recommended combo?
Last edited by TonyM on Thu Apr 25, 2019 6:10 am, edited 1 time in total.

alcatraz
Posts: 1912
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

I believe they are compatible (although I haven't tried personally).

36/46 34/50 36/52 39/59 are all standard combinations. Sure a 10t difference should shift better than a 16t difference but shimano shifts so well that 16t difference works fine.

by Weenie


Ritxis
Posts: 325
Joined: Fri Jun 01, 2012 3:00 pm
Location: San Sebastian

by Ritxis

Yes, is possible.....there's only one "Paste "............the aesthetics, the forms of cranks/chainrings do not exactly match

Ritxis
Posts: 325
Joined: Fri Jun 01, 2012 3:00 pm
Location: San Sebastian

by Ritxis

Power can be, only the "subject" aesthetic
Ultegra-vs-Dura-Ace.jpg

Smeagol
Posts: 24
Joined: Fri Jan 20, 2006 1:34 am

by Smeagol

It works but will look like this
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wfcarrot
Posts: 36
Joined: Sat Feb 23, 2019 8:46 pm

by wfcarrot

It can be, but you won't like it.

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TonyM
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Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Smeagol wrote:It works but will look like this
Ok I see the difference in the finish indeed!

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TonyM
Posts: 3008
Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Thanks for the feedback guys!

I suppose I will stick with the DA chainrings for the DA crankset.

WorkonSunday
Posts: 94
Joined: Tue Jan 16, 2018 4:39 pm

by WorkonSunday

yes, it can be done. both my wife's and my gravel bikes are using 46/34. mine is Ultegra 6800 and hers is R8000. just watch for small/small chain tension when you switch from 36 to 34.
In the house: Colnago V1r (SR EPS/SES6.7), Colnago A1r (DA/Zipp302/404), Wilier Cento1 Air (6800/bora1), Scott Scale 700SL (XX1), Bianchi FSE (XO1), Colnago Concept(R8050/bullet80), Colnago A1r (R8000/ATR), Specialized Ruze Pro (XX1), Wilier GTR (Force22)

trainergav
Posts: 9
Joined: Fri Nov 30, 2018 10:36 pm
Location: Vancouver, BC

by trainergav

I ride an Ultegra 6800 46/34 on my gravel bike/commuter and it's fine. I have no issues shifting, altough it sometimes feels a bit rough when just pedaling. But that being said it's a bit of a frankenbike with mostly 6800 components but a rx clutch derailleur, shimano non series shifters and a non-series 11-34 cassette. My usual rule is to only pair like with like so I'm not surprised that things aren't perfect. I do find that the loss of 4 teeth is very noticiable when I am riding on the road however and I am frequently in the 46/11.

talltales
Posts: 38
Joined: Mon Mar 11, 2019 10:43 pm

by talltales

Smeagol wrote:
Thu Apr 25, 2019 10:17 am
It works but will look like this
Is this not 6800 rings? I believe they look different from r8000.

biwa
Posts: 115
Joined: Fri Sep 21, 2018 8:39 pm

by biwa

Was thinking to try the same thing, now think probably should stick to DA chainrings. Besides the look, I do wonder if there is any weight/material difference

by Weenie


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