Dura Ace 9000 Chainring Sizes

Discuss light weight issues concerning road bikes & parts.
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JimmyRingo
Posts: 33
Joined: Thu Mar 04, 2010 11:50 pm

by JimmyRingo

Currently have 52/36 - I would ideally like to slip a 34 on there and run 52/34. Anybody out there mannaged this? Aware that it exceeds the 14t recommended variance.

Maratona coming up with a possible trip to the Zoncolan - ouch. :D I don't imagine being out the 34 much on these rides.

Thanks!

dmoneysworks
Posts: 313
Joined: Tue Aug 07, 2012 6:35 am
Location: Parakai, New Zealand

by dmoneysworks

I know a guy whom ran a 53-34T combo for a 125k hilly ITT and worked out okay for him & a mate runs a 53-36T combo without issue :thumbup:

efeballi
Posts: 471
Joined: Tue Dec 17, 2013 2:50 pm
Location: Body in Milano, mind in Istanbul

by efeballi

+1.
Shimano sponsored teams used 53-34, 52-34 and 53-36 last year, can't remember where.
They all had Di2 which improves front shifts tho.


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upside
Posts: 601
Joined: Fri Mar 09, 2007 1:26 am
Location: USA

by upside

Yup, its works. I have used a 52X34..52X36. The 52X36 shifts like butter and when you use the 34 you will hear a bit more shifting noise. It takes a few seconds longer for the derailleur to find the shifting ramps. Hope this helps

maxxevv
Posts: 1952
Joined: Wed Feb 09, 2005 4:51 am

by maxxevv

Get a 30T or 32T cassette.

Unless you're just swapping the 36T to 34T without consideration of the ramping for the big ring, swapping the cassette will be cheaper.

excremanwu
Posts: 100
Joined: Mon Feb 16, 2009 8:29 am

by excremanwu

tried, rd-9000 can run 30t

spdntrxi
Posts: 1489
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

excremanwu wrote:tried, rd-9000 can run 30t


my 9070-RD can run 32t I just don't use big-big.

Carrots
Posts: 112
Joined: Sat Dec 07, 2013 8:04 am

by Carrots

Upping the cassette most likely requires a new RD for the longer cage though surely?


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spdntrxi
Posts: 1489
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

Carrots wrote:Upping the cassette most likely requires a new RD for the longer cage though surely?


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Shimano does not recommend it of course... but I'm just saying the 9070-RD can handle 32t with it's short cage.. no problems. Yes you can always get the 6870 mid if you like.

Svetty
Posts: 491
Joined: Thu Mar 26, 2009 11:06 pm
Location: Yorkshire - God's Own Country

by Svetty

Can confirm that 32 will work with standard 9000 rear mech.

JimmyRingo
Posts: 33
Joined: Thu Mar 04, 2010 11:50 pm

by JimmyRingo

Thanks for the replies all, purchased the 34t will attempt to fit it tonight. I'm using the DA9000 with Campag 11sp cassette and I think that in that respect I'm maxed at 29t sprocket.

Carrots
Posts: 112
Joined: Sat Dec 07, 2013 8:04 am

by Carrots

So just to dig up this thread again....

Anyone considered running 52x34 QRings (or similar oval rings)? Anyone done it previously without issue?

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06SpiceRed
Posts: 33
Joined: Thu May 12, 2011 5:06 am
Location: Boulder, Colorado

by 06SpiceRed

Carrots wrote:So just to dig up this thread again....

Anyone considered running 52x34 QRings (or similar oval rings)? Anyone done it previously without issue?


I have done it for really hilly rides here in Colorado and have had it for a long period of time. I have Di2 and noticed NO difference in FD shifting. The only extra difference was drive chain noise when the FD shifts.
A bunch of carbon, with a bunch of electronic parts

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