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PostPosted: Sun Dec 30, 2012 10:26 pm 
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Joined: Wed Mar 09, 2011 6:01 pm
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Location: Birch, Essex, UK
I have a set Shimano Hollowtech II cranks [FC-R700] with the standard 50/34 chainrings.....but they won't give me quite the gears i would like.....How would 49/36 work.....i use downtube shifters with a 9 speed cassette....in index mode.....The front mech is a Shimano Ultegra and the rear mech is Shimano 105 both 9 speed versions.......If i change what would be better TA or Stronglight Zircal rings...or are jusr as good?.....Any advice would be appreciated.


Last edited by sawston_vulcan on Mon Dec 31, 2012 12:01 am, edited 1 time in total.

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PostPosted: Sun Dec 30, 2012 11:15 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
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Location: New Forest, UK
Some front mechs will not like the 7t difference, and you would have to mount the mech higher - with worse shifting :(

Personally I prefer TA rings, because the standard of finish is gorgeous. But Stronglight rings are good too.


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PostPosted: Mon Dec 31, 2012 12:03 am 
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hamster wrote:
Some front mechs will not like the 7t difference, and you would have to mount the mech higher - with worse shifting :(

Personally I prefer TA rings, because the standard of finish is gorgeous. But Stronglight rings are good too.


7T?...Currently the difference is 16T.....if i had a 49/36 set up the difference would be 13T which would be the same if i had a 53/39 set up on 130 bcd cranks?......or am i missing something.....resulting in me staying with 50/34?


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PostPosted: Mon Dec 31, 2012 9:26 am 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
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Location: New Forest, UK
Sorry, the dangers of retrobike after wine... :oops:

Try it and see, I ran a 29/42 Middleburn Duo with a Campagnolo Record road mech very successfully.


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PostPosted: Mon Dec 31, 2012 4:54 pm 
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Location: Cardiff
I think front mechs like 10 teeth difference to shift properly...


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PostPosted: Tue Jan 01, 2013 7:21 pm 
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Joined: Mon Feb 01, 2010 8:57 pm
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I run 46/36 for CX and the shifts are noticeably quicker and crisper


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PostPosted: Fri Jan 04, 2013 6:27 pm 
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Location: Birch, Essex, UK
I am going to try 46/34......12 difference and see how that goes,,,might change the 34 for a 36.


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