HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Articles FAQ Contact About




Post new topic Reply to topic  [ 18 posts ] 
Go to page 1, 2  Next
Author Message
PostPosted: Mon Jun 15, 2015 9:07 pm 
Offline

Joined: Wed Apr 29, 2015 8:57 am
Posts: 12
I'm off to the Alps in July for a couple of weeks riding including L'etape du tour & to see the penultimate TDF stage on Alpe d'Huez.

I'm a bit over geared at the moment & I think I'm going to need a 34t inner but I don't really want to change my 52t outer unless I have to.

On the campy website & knowledge base the chainrings are listed in pairs 50/34 52/36 53/39 & described as '50t for 34t' but they are available individually. Does any one know if there will be any issue with using them in different combos eg 52/34? I really don't want to shell out £200 for a pair of chainrings I'll use a couple of times unless I really have to. Thanks


Top
 Profile  
 
Posted: Mon Jun 15, 2015 9:07 pm 


Top
  
 
PostPosted: Tue Jun 16, 2015 1:06 am 
Offline

Joined: Tue Feb 14, 2006 4:42 am
Posts: 918
Location: Calgary
I think the 52/36 combo just wouldn't work very well. The jump is huge and I wonder if your front derailleur could handle it well.

What about just picking up a Chorus cassette with lower gearing than your usual? Screw it on for the trip, take it off when you get home and stick it in the box until you go to the big mountains next year. I'm not familiar with UK prices but it might be cheaper than a couple of rings as well and certainly would work well. I have Record and Chorus 11 bikes that seem to work well with 11-25, 12-27 or 12-19 cassettes without adjustment. I did 12 days in the Alps last year with a 34-29 as my low gear and I'm old and fat (64, 85 kg).


Top
 Profile  
 
PostPosted: Tue Jun 16, 2015 10:12 am 
Offline
User avatar

Joined: Wed Apr 25, 2007 10:23 am
Posts: 814
Location: Pack filler
Just buy a shimano 105 compact or semi compact chainset. 60 odd quid at the moment if you look around for the new 4 arm ones, plus a bottom bracket (£20)
Shifting is fantastic (im on a 35/52 on the hack bike).

hand it down to the winter bike when you're back.

other alternative is go to a cassette with a 29 on it, although i've ridden alps/ dolomites numerous times with 39/25 as bottom gear and been fine..

_________________
Official cafe stop tester


Top
 Profile  
 
PostPosted: Tue Jun 16, 2015 11:20 am 
Offline
User avatar

Joined: Fri Jan 15, 2010 7:22 pm
Posts: 224
Location: Les Pays Bas
c50jim wrote:
I think the 52/36 combo just wouldn't work very well. The jump is huge and I wonder if your front derailleur could handle it well.


This combo gives no problems whatsoever, I bought it from Campa like this. I later changed the 52T outer ring with a 50T outer ring and although it has 50-34 stamped on it, it works great with a 36T inner ring. I always understood that the front derailleur is not capable of handling a bigger drop than 52-36, so that means 52-34 won't work. Maybe somebody on this forum has tried it and he / she can chime in.

Please note that I am using a pre 2015 crankset though.


Top
 Profile  
 
PostPosted: Tue Jun 16, 2015 1:40 pm 
Offline

Joined: Mon Apr 20, 2015 9:03 am
Posts: 6
Very interested to read this thread, I too am heading to the Alps next month for the Etape and currently have a 53/39 crankset and hoping that a 52/36 would be suitable with a 12/29 rear cassette?!

I rode some biggish (for me anyway) hills on Sunday in north west French coast and managed to climb ok but had no more gears left :(

If the 52/36 works out ok, I'll probably replace the standard one for ever.


Miles


Top
 Profile  
 
PostPosted: Tue Jun 16, 2015 5:04 pm 
Offline

Joined: Wed Apr 29, 2015 8:57 am
Posts: 12
Thanks for the replies. It sounds like the front mech can't cope with the difference between 52 & 34. I've ordered a 12-29 cassette today £100 :shock: hopefully I'll be OK with that.


Top
 Profile  
 
PostPosted: Tue Jun 16, 2015 8:59 pm 
Offline

Joined: Sun Jan 05, 2014 11:04 pm
Posts: 42
Location: Denmark
some have reported it works flawlessly, i'm going to try it these days, then i can report back :)


Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 1:40 am 
Offline
User avatar

Joined: Tue Sep 28, 2004 7:39 am
Posts: 1512
Location: Canada
Campy front derailleur doesn't work well with a gap of more than 16 tooth between the big and small chainrings.

you could also do 50-34 with the new 11-29. 50-11 is taller than 52-12.

_________________
██ MARTINI


Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 2:01 am 
Offline

Joined: Mon Sep 07, 2009 3:10 am
Posts: 388
I think the FD will work fine, but you will probably have a problem with finding a good chain length with 52/34 and 11/29.

What will happen is that you will have a good chain length for 52/29 and then when the chain is in 34/11 the chain will be very slack. The RD will not be able to take up the slack. If you shorten the chain so that 34/11 is good, then 52/29 will be too tight.

52/34 will probably work with 11/25 and maybe 11/27, I doubt it will work with 11/29.


Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 5:37 am 
Offline

Joined: Wed Oct 15, 2014 6:12 pm
Posts: 141
I'm running 53/34 on my 2015 Campag Record with 11/27 and no problems at all.


Last edited by BlackMadone on Wed Jun 17, 2015 6:42 am, edited 1 time in total.

Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 5:54 am 
Offline
User avatar

Joined: Tue Sep 09, 2014 9:30 am
Posts: 183
Unfortunately Campag do not have a mid-cage RD (or do they?). That would take care of the chain length and slack problem.


Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 6:42 am 
Offline

Joined: Wed Oct 15, 2014 6:12 pm
Posts: 141
kkibbler wrote:
Unfortunately Campag do not have a mid-cage RD (or do they?). That would take care of the chain length and slack problem.

Its not needed.


Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 8:06 am 
Offline

Joined: Wed Apr 29, 2015 8:57 am
Posts: 12
Thanks Blackmadone that's just what I needed, I'll see how I get on with the 12-29 then maybe get the 34t as well. Just wish I had some comparable climbs around here to test it out :(


Top
 Profile  
 
PostPosted: Wed Jun 17, 2015 8:16 am 
Offline

Joined: Fri Jan 31, 2014 4:54 pm
Posts: 294
On my 2015 Chorus I'm currently riding with 52-36 and 12-29 combo.
Which is fast enough for long, not steep descents and also great for +20% climbs.

Before that, on my Shimano setup I had 53-39 chainset and I am kind of missing the close range between small and big chainring. So I can't even imagine how huge it will be with a 52-34 setup. I wouldn't like it for sure, even if it works properly.

_________________
Orbea Orca
Stava
Instagram


Top
 Profile  
 
Posted: Wed Jun 17, 2015 8:16 am 


Top
  
 
PostPosted: Wed Jun 17, 2015 1:38 pm 
Offline
User avatar

Joined: Sun Nov 07, 2010 9:14 pm
Posts: 1969
I agree with @Sedluk about the chain length issue. With a proper length chain setup with any of the 3 stock chainring combos the rear dérailleur has enough capacity to handle any cassette range from 11 (smallest cog) to 29 (largest cog). Meaning you could have several wheels with various cassette choices and just quickly change them without worry about the chain being too short or too long.
But man, I'm with the previous poster that the jump between a 52 and 34 would be a huge annoyance while shifting, particularly with a large range (11/29) cassette. I don't like even a 50/34 for that reason. Find myself constantly jumping between big and small rings searching for the next appropriate gear. I haven't tried the 52/36 combo yet and was hoping that might be better in that regard. But sounds like the previous poster still misses his 53/39 for the same reason.

_________________
My Colnago C59
My Special Colnago EPQ
Trek Emonda SL


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ] 
Go to page 1, 2  Next


Who is online

Users browsing this forum: clipsed, Daveaero, Google Adsense [Bot], spiderghost and 41 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. When will 2015 Campagnolo SR Mechanical be available

[ Go to page: 1, 2 ]

in Road

mnmasotto

15

2316

Thu Sep 18, 2014 9:30 pm

bm0p700f View the latest post

There are no new unread posts for this topic. Campagnolo 2015 TT barend shifters

in Road

jimborello

3

531

Wed Nov 26, 2014 6:19 pm

jma6610 View the latest post

There are no new unread posts for this topic. Attachment(s) Campagnolo mechanical 2015 (Mix & Match)

[ Go to page: 1, 2, 3, 4 ]

in Road

9x12man

56

5654

Fri Mar 27, 2015 5:50 pm

kgt View the latest post

There are no new unread posts for this topic. Attachment(s) New 2015 Campagnolo Front Derailleur

[ Go to page: 1, 2, 3, 4 ]

in Road

neeb

50

5760

Tue Jul 14, 2015 6:10 pm

phunky View the latest post

There are no new unread posts for this topic. Campagnolo 2015 video manual

in Road

stormur

1

475

Sat Oct 11, 2014 12:32 am

highdraw View the latest post


It is currently Sun Aug 02, 2015 3:51 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB