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Dura Ace 9000 Chainring Sizes
Posted: Mon Jun 02, 2014 10:07 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.
I don't imagine being out the 34 much on these rides.
Thanks!
Re: Dura Ace 9000 Chainring Sizes
Posted: Mon Jun 02, 2014 10:55 pm
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
Re: Dura Ace 9000 Chainring Sizes
Posted: Mon Jun 02, 2014 10:55 pm
by Weenie
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Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 12:35 am
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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Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 1:21 am
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
Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 2:43 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.
Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 3:01 am
by excremanwu
tried, rd-9000 can run 30t
Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 3:10 am
by spdntrxi
excremanwu wrote:tried, rd-9000 can run 30t
my 9070-RD can run 32t I just don't use big-big.
Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 3:28 am
by Carrots
Upping the cassette most likely requires a new RD for the longer cage though surely?
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Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jun 03, 2014 3:38 am
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.
Re: Dura Ace 9000 Chainring Sizes
Posted: Wed Jun 04, 2014 1:56 pm
by Svetty
Can confirm that 32 will work with standard 9000 rear mech.
Re: Dura Ace 9000 Chainring Sizes
Posted: Thu Jun 05, 2014 6:50 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.
Re: Dura Ace 9000 Chainring Sizes
Posted: Tue Jul 29, 2014 1:20 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?
Re: Dura Ace 9000 Chainring Sizes
Posted: Wed Jul 30, 2014 5:29 pm
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.
Re: Dura Ace 9000 Chainring Sizes
Posted: Wed Jul 30, 2014 5:29 pm
by Weenie
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