Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Thu Dec 14, 2017 2:45 pm

All times are UTC+01:00





Post new topic  Reply to topic  [ 16 posts ]  Go to page 1 2 Next
Author Message
PostPosted: Sat Dec 17, 2016 11:03 am 
Offline

Joined: Sat Dec 31, 2005 2:46 pm
Posts: 133
I have very bad shifting on my Simplon Kiaro bike. The SuperRecord 2011 group worked like a dream on my former bike, so I started to search for answers.
I've found out that the problem is the braze on clamp on my frame. I can move a bit under shifting pressure, causing the problems.
I'm afraid the best (only?) option is to remove the clamp (drill the rivets) and use a new front clamp like this https://www.bike24.com/1.php?content=7; ... ;orderby=2

Anybody a good other suggestion? My first choice would be to leave the frame intact and find a better solution using the original clamp.


Top
   
Posted: Sat Dec 17, 2016 11:03 am 


Top
   
 
PostPosted: Sat Dec 17, 2016 2:19 pm 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
with etap there are 'wedges' supplied that can be used to prevent the fd twisting if the clamp isn't stiff enough

perhaps you can improvise something similar


Top
   
PostPosted: Sat Dec 17, 2016 2:35 pm 
Offline

Joined: Sat Dec 31, 2005 2:46 pm
Posts: 133
How do you attach those wedges? I cannot find them online.


Top
   
PostPosted: Sat Dec 17, 2016 3:50 pm 
Offline
User avatar

Joined: Sun Nov 02, 2003 6:48 am
Posts: 1277
Location: Central USA
Campagnolo mechanical 2015 and after has 2 front der models. One of them ( it's called S2) has a small little arm that presses against the seat tube to reduce movement caused be the mounting tab flexing.

Shown at 5:42 of this installation video by Campagnolo https://www.youtube.com/watch?v=Y_1pkG2XfT0


Last edited by tommasini on Sat Dec 17, 2016 5:29 pm, edited 3 times in total.

Top
   
PostPosted: Sat Dec 17, 2016 5:27 pm 
Offline

Joined: Sat Dec 31, 2005 2:46 pm
Posts: 133
Thnx! That looks like a solution, but not for my problem :-(. A 2011 shifter will not work with that front derailleur.
Good reason to buy a new groupset ;-)


Top
   
PostPosted: Sat Dec 17, 2016 7:20 pm 
Offline

Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
Daniel1975 wrote:
How do you attach those wedges? I cannot find them online.


they are supplied with the etap fd, also designed specifically for it, you can see one in the image below (not mine)

if the mounting bolt has a through hole, you may be able to use a long bolt and then use the protruding end to mount something that will press against the seat tube to prevent the fd twisting on the upshift - whatever you use, make sure the load is spread over a reasonable area of the seat tube otherwise it might cause damage

Image


Top
   
PostPosted: Sat Dec 17, 2016 8:09 pm 
Offline
User avatar

Joined: Sun Mar 16, 2014 3:43 pm
Posts: 817
Daniel1975 wrote:
I have very bad shifting on my Simplon Kiaro bike. The SuperRecord 2011 group worked like a dream on my former bike, so I started to search for answers.
I've found out that the problem is the braze on clamp on my frame. I can move a bit under shifting pressure, causing the problems.
I'm afraid the best (only?) option is to remove the clamp (drill the rivets) and use a new front clamp like this https://www.bike24.com/1.php?content=7; ... ;orderby=2

Anybody a good other suggestion? My first choice would be to leave the frame intact and find a better solution using the original clamp.


- Please make some clear pictures/vid of the issue.
- Did you contacted Simplon already?


Top
   
PostPosted: Sat Dec 17, 2016 10:27 pm 
Offline

Joined: Tue Dec 23, 2008 2:57 pm
Posts: 868
Location: NYC
The OP is describing a problem with a front der TAB (riveted to frame) not a frt der clamp (bolted on frame)....he simply got the description incorrect.

Neither the Campy S2 frt der with the built in support arm or the SRAM eTap spacers/wedges will solve the poor shifting caused by the loose rivet. This is a frame repair issue. Some manufacturers will send their dealers a rivet kit to repair the frame, while other manufacturers will simply replace frame. If the downtube is perfectly round where the current tab is riveted, then using a bolt on clamp might be a solution, otherwise, a frame repair is the only solution. EM3

_________________
______________


Top
   
PostPosted: Sat Dec 17, 2016 10:56 pm 
Offline

Joined: Sat Dec 31, 2005 2:46 pm
Posts: 133
It's not a loose rivet. Maybe we're lost in translation (i'm dutch).
I meant i have to drill the 4 small rivets to remove the clamp. In my opinion it's just poor design.
https://youtu.be/ZRUPgbl7O-A


Top
   
PostPosted: Sat Dec 17, 2016 11:40 pm 
Offline
User avatar

Joined: Sun Nov 07, 2010 9:14 pm
Posts: 4770
Yes, your English is fine. I didn't read it as a loose rivet problem, but rather simply there's some flex in that area, be it due to a soft brazeon tab, a thin walled or flimsy frame tube, or a combination of the two. The newer long arm derailleurs have either a support screw (Shimano) or a little arm that you can butt up against the frame tube (newer Campy S2 front derailleur). But sounds like you're using the 2011 SR Front derailleur, which does not have the support arm, as it's the old style without the new longer arm which can exert significantly more leverage in the system. You've pretty much thought through your options already. Just make sure the cause of your poor front shifting is indeed due to the flex in the braze-on tab area and not simply due to something you may have overlooked like improper adjustment, worn chain, rings, etc. Good luck. But indeed, contact the manufacturer and ask their opinion first of all.

_________________
Colnago C60 - PR99
C59 Five Years Later
My Special Colnago EPQ
Trek Emonda SL Campagnolo SR


Top
   
PostPosted: Sun Dec 18, 2016 11:32 am 
Offline

Joined: Sat Dec 31, 2005 2:46 pm
Posts: 133
Does anybody know if this support bolt really works? The wedge from Sram as seen a few posts above looks like something that works, but I cannot find good pictures of the Shimano-solution.
Looking at Sram and Shimano, I think they have a better solution than the S2-system from Campy.

Image


Top
   
PostPosted: Sun Dec 18, 2016 6:43 pm 
Offline
User avatar

Joined: Sun Nov 07, 2010 9:14 pm
Posts: 4770
Yes, it works, in the sense that it provides exactly what it says... a little more "support" when the derailleur wants to naturally twist that way. It doesn't change anything about your brazeon tab or your frame however. The little tabs are simply there to protect your frame from the screw going right into it. Many derailleur tabs have an appropriate spot that the screw will butt up against and making the stick on tabs redundant. But if your entire frametube/brazeon is flexing, the derailleur will move right along with it, as will the support screw.
And see that last image at the bottom of the page you posted above... especially where they say to set it up initially with a 0.5-1mm inward angle, then to use the support screw to push it out so that it's parallel with the chain ring. Be very careful with that guideline as I think it's way too much. Rather, I would try to get the cage set as parallel as possible with the chain rings from the get go, and only then turn the support screw so that it barely touches the support plate or brazeon tab, but still has contact so it can do it's thing.
Here's an example of what happened with a 2012 Cannondale Evo brazeon tab, which was not designed to be used with the newer long arm front derailleurs and the new support screw...
Image
Old design (pre 2013) on the left. You can see where the support bolt made contact, but due to both the angle it made contact with the tab and perhaps the weakness of the tab itself, when the new Shimano 9000 front derailleur was being installed, as in the instructions you posted above, that 0.5mm of necessary final adjustment was all it took to snap the tab and break it. The tab on the right is the updated beefier version and also includes a flat "shelf" that the support screw can butt up against. The key in that last instruction is to just "tentatively" tighten the derailleur at this position, so that it can still move a bit on the tab without taking the tab with it as that final adjustment of the support screw is made.

_________________
Colnago C60 - PR99
C59 Five Years Later
My Special Colnago EPQ
Trek Emonda SL Campagnolo SR


Top
   
PostPosted: Sun Dec 18, 2016 9:50 pm 
Offline

Joined: Sat Dec 31, 2005 2:46 pm
Posts: 133
I think my best and easiest option is to remove the tab and use a 34,9mm clamp.
The seatpost is exactly that size.


Top
   
PostPosted: Sun Dec 18, 2016 10:42 pm 
Offline
User avatar

Joined: Sun Mar 16, 2014 3:43 pm
Posts: 817
Maybe in the end yes. But I would contact Simplon first. Possibly they have an other solution for you and also with an eye on warranty issues in the future.


Top
   
PostPosted: Mon Dec 19, 2016 1:15 am 
Offline

Joined: Sat Feb 13, 2016 7:49 pm
Posts: 18
Can't see what is flexing in your video, but if it is the frame, it is broken. Should not move a bit under the pressure you seem to be exerting. Just having a similar issue with a Canyon where the frame is being replaced without question(thanks Canyon!). Tab was way more stable in the beginning and has deteriorated over one year of use.
Florian


Top
   
Posted: Mon Dec 19, 2016 1:15 am 


Top
   
 
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 16 posts ]  Go to page 1 2 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Light Etap front derailleur clamp

in Road

liam7020

11

1129

Sun Jan 29, 2017 12:18 pm

liam7020 View the latest post

There are no new unread posts for this topic. Attachment(s) How to install a Campy SR 11s fr. derailleur clamp-on 35mm on a Colnago Super?

in Road

Kupepe

0

243

Fri Mar 17, 2017 12:36 pm

Kupepe View the latest post

There are no new unread posts for this topic. Campagnolo Front Derailleur Question

[ Go to page: 1 2 ]

in Road

matty

16

1273

Sun Mar 19, 2017 11:10 am

matty View the latest post

There are no new unread posts for this topic. S2-system on Campagnolo front derailleur

[ Go to page: 1 2 ]

in Road

Daniel1975

17

2057

Thu Jan 05, 2017 10:16 pm

Calnago View the latest post

There are no new unread posts for this topic. Compatibility between etap front derailleur and the 53-39 Q-ring

in Road

Eclat

1

448

Wed Mar 08, 2017 6:11 pm

1415chris View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: AZR3, Baidu [Spider], Chris3g, ColnagoJohn, coriordan, darnellrm, Google Adsense [Bot], Ironbarista, karmaz, madik, Matt28NJ, nmx, savechief, TurboKoo and 48 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:  
Powered by phpBB® Forum Software © phpBB Limited