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PostPosted: Mon Jun 02, 2014 10:07 pm 
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Joined: Thu Mar 04, 2010 11:50 pm
Posts: 33
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!


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Posted: Mon Jun 02, 2014 10:07 pm 


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PostPosted: Mon Jun 02, 2014 10:55 pm 
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Joined: Tue Aug 07, 2012 6:35 am
Posts: 291
Location: Parakai, New Zealand
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:


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PostPosted: Tue Jun 03, 2014 12:35 am 
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Joined: Tue Dec 17, 2013 2:50 pm
Posts: 448
Location: Istanbul, Turkey
+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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PostPosted: Tue Jun 03, 2014 1:21 am 
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Joined: Fri Mar 09, 2007 1:26 am
Posts: 558
Location: USA
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


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PostPosted: Tue Jun 03, 2014 2:43 am 
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Joined: Wed Feb 09, 2005 4:51 am
Posts: 1866
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.


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PostPosted: Tue Jun 03, 2014 3:01 am 
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Joined: Mon Feb 16, 2009 8:29 am
Posts: 99
tried, rd-9000 can run 30t


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PostPosted: Tue Jun 03, 2014 3:10 am 
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Joined: Sat Jul 20, 2013 6:11 pm
Posts: 929
excremanwu wrote:
tried, rd-9000 can run 30t


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


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PostPosted: Tue Jun 03, 2014 3:28 am 
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Joined: Sat Dec 07, 2013 8:04 am
Posts: 97
Upping the cassette most likely requires a new RD for the longer cage though surely?


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PostPosted: Tue Jun 03, 2014 3:38 am 
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Joined: Sat Jul 20, 2013 6:11 pm
Posts: 929
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.


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PostPosted: Wed Jun 04, 2014 1:56 pm 
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Joined: Thu Mar 26, 2009 11:06 pm
Posts: 372
Location: Yorkshire - God's Own Country
Can confirm that 32 will work with standard 9000 rear mech.


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PostPosted: Thu Jun 05, 2014 6:50 pm 
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Joined: Thu Mar 04, 2010 11:50 pm
Posts: 33
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.


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PostPosted: Tue Jul 29, 2014 1:20 am 
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Joined: Sat Dec 07, 2013 8:04 am
Posts: 97
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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PostPosted: Wed Jul 30, 2014 5:29 pm 
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Joined: Thu May 12, 2011 5:06 am
Posts: 33
Location: Boulder, Colorado
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.

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Posted: Wed Jul 30, 2014 5:29 pm 


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