Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-17-11, 12:29 PM   #1
Again
Oldie
Thread Starter
 
Again's Avatar
 
Join Date: Jun 2011
Location: Medford, Oregon
Bikes: Lance Exodus Europe, Univega Sportour, Motobecane Cafe Latte
Posts: 411
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Clamp-on to carbon frame?

I am expecting a CF set without braze-on for the FD. Is it OK to use a clamp on the seat tube? Are there any carbon frames around that use clamps successfully for that?
Again is offline   Reply With Quote
Old 09-17-11, 12:32 PM   #2
mechBgon
Senior Member
 
mechBgon's Avatar
 
Join Date: Jul 2002
Bikes:
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes, that's normal. Think about it, if there's no braze-on style tab, what other option is there?
mechBgon is offline   Reply With Quote
Old 09-17-11, 12:39 PM   #3
jimc101
Senior Member
 
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Bikes:
Posts: 4,773
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Take it you mean a clamp on FD, then you can, the one here has a SRAM Rival band on spec'd http://www.planet-x-bikes.co.uk/i/q/...ival-road-bike

You can get braze on adaptors, I have one of these on my carbon bike, I prefer this to the band on FD with carbon, and it works fine with it. here's an example from Campagnolo http://www.jensonusa.com/store/produ...p+Adapter.aspx other cheaper ones are available.

Would look at what the build up version of you frame has / any manufacture recomendations and go with them.
jimc101 is offline   Reply With Quote
Old 09-17-11, 12:53 PM   #4
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,688
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 232 Post(s)
A decent carbon frame will be reinforced slightly (or not need it) where the maker expects you to clamp on a front derailleur. But be aware that it's possible to damage the tube by over tightening or with a badly formed rigid clamp body.

Fit the FD around the tube and close the clamp with your fingers. It should fit right and close finger tight without digging in anyplace. Some may need a bit of flex for the curves to match, but if it needs more that a light touch, the clamp will distort the tube when tightened and crack it. Also check mfr. torque specs, or if none are available tighten only as tight as needed for the FD to do it's job. I paint a bit of traction compound inside the clamp to increase friction and lower the needed clamping force.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 09-17-11, 02:30 PM   #5
Again
Oldie
Thread Starter
 
Again's Avatar
 
Join Date: Jun 2011
Location: Medford, Oregon
Bikes: Lance Exodus Europe, Univega Sportour, Motobecane Cafe Latte
Posts: 411
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Great, guys - that eases my mind. Good to see there are lots of clamp-on FD on the market as well.
I have a set of Ultegra brifters I intend to use for the build.
On the other hand I want to use a Sugino triple I bought recently (165mm!).
I want to be sure to eliminate any problems with step synchronization.
Is the Sugino compatible with Shimano?
Again is offline   Reply With Quote
Old 09-17-11, 02:35 PM   #6
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,688
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 232 Post(s)
Quote:
Originally Posted by Again View Post
On the other hand I want to use a Sugino triple I bought recently (165mm!).
The cranks are OK, but be sure to use a triple FD and triple left lever. I'm not as familiar with Ultegra levers as others are, so they may all be triple compatible, but it's something to confirm.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 09-17-11, 03:39 PM   #7
pmt
Experienced
 
Join Date: Sep 2007
Bikes:
Posts: 1,005
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by FBinNY View Post
I paint a bit of traction compound inside the clamp to increase friction and lower the needed clamping force.
+1, me too!

Oh bollocks, I just did a "me too" post.
pmt is offline   Reply With Quote
Old 09-17-11, 03:47 PM   #8
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,688
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 232 Post(s)
Quote:
Originally Posted by pmt View Post
...

Oh bollocks, I just did a "me too" post.
Your first?
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 12:42 AM.