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 01-17-13, 02:34 AM   #1
KeremMacias
DemoMaya
Thread Starter
 
Join Date: May 2012
Location: SF Bay Area
Bikes: Trek 2300 Alpha SL
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Tips and tricks - buidling a bike campy sr11

Hello everybody, finally I have all the parts bought from the auction site. Save a ton of $.
I am a very good car mechanic but this does not mean i will be a good bike mechanic.This is my first build. I have a carbon frame and 2010 Campagnolo SR 11 components. Could you give me advice on what are the critical details of putting a bike together? I have a torque wrench and a few specialty tools. If you think it is better to take it to a LBS tell me so, I will not be offended. Thanks in advance!
KeremMacias is offline   Reply With Quote
Old 01-17-13, 05:44 AM   #2
cranky old road
Let your bike be the tool
 
cranky old road's Avatar
 
Join Date: Jun 2006
Location: NC/SC border
Bikes: '66 Raleigh Carlton, '70 Ron Cooper, '95 Bianchi CD'I, Zonal Frame with Xenon gruppo, Carbon Frame with Record Gruppo, Columbia Twosome, Terry Classic, Bianchi SX, Gravity SS/FG
Posts: 820
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If the components did not come with their installation instructions, instructions are downloadable on the Campagnolo website.
cranky old road is offline   Reply With Quote
Old 01-17-13, 07:31 AM   #3
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,847
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Talk about starting at the top!

As recommended, Campy's web site has installation sheet in downloadable form if you didn't get the booklets with the components. Also, Park Tools' web site has tutorials covering almost all types of components and I recommend you spend some time there also.
HillRider is offline   Reply With Quote
Old 01-17-13, 09:13 AM   #4
DaveSSS
Senior Member
 
Join Date: Sep 2008
Location: Loveland, CO
Bikes: Two LOOK 585s, one KG461
Posts: 4,987
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Unfortunately, Campy still has some poor instructions published. Installing the UT BB cups has a few critical requirements. The BB width must be 67.2-68.8mm in width and the BB shell faces must be square to the threads. Remove any paint from the faces and measure the width at several locations. Most modern frames don't require facing, but it's good to check for thread to face squareness. I do this by screwing in the cups until they contact a .010 inch feeler gage and then use .008-.012 inch feelers to hunt for larger or smaller gaps. If any area exceeds these limits, then facing the BB shell is a must, but the amount of material removed should be kept to a minimum, so the shell width is not compromised.

I use grease on the cup threads and torque the cups to 35Nm. Never use the loctite method. Campys fails to mention that their factory applied thread locking material has to be removed before using loctite and the idea of hand-tightening the cups is very bad advice, aimed at getting the bike assembled, without the proper thread squareness.
DaveSSS is offline   Reply With Quote
Old 01-17-13, 10:14 AM   #5
KeremMacias
DemoMaya
Thread Starter
 
Join Date: May 2012
Location: SF Bay Area
Bikes: Trek 2300 Alpha SL
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the advice. I read the Campagnolo instructions. They are ok. I will follow them. Thanks again.
KeremMacias is offline   Reply With Quote
Old 01-17-13, 10:53 AM   #6
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Bikes: copy/paste links: http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
Posts: 7,099
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Might be a bit dicey assembling a carbon bike with no experience...

There can be a very small margin of error between too loose and too tight on a lot of fasteners, and torque specs for bikes aren't as reliable for bikes as they are for cars, due to the much lower tolerances and vast scope of unknowns, eg how do you determine a seatpost clamp torque when you don't know what seatpost will be used?

Suffice to say, experience counts for a lot here. Increase your margin of error with carbon assembly paste, which will allow lower torque without slippage.
Kimmo is offline   Reply With Quote
Old 01-17-13, 11:24 AM   #7
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 19,642
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 437 Post(s)
Lesser bikes are more suitable to shade tree mechanics.. perhaps more practice on a few of those..

I reccomend using a Pro Level Bike Shop services.

Auto repair shop rates are still higher than the Bike shop rates , so You can afford them too.
fietsbob is offline   Reply With Quote
Old 01-17-13, 02:00 PM   #8
Drew Eckhardt
Senior Member
 
Drew Eckhardt's Avatar
 
Join Date: Apr 2010
Location: Sunnyvale, CA USA
Bikes:
Posts: 5,101
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Quote:
Originally Posted by fietsbob View Post
Lesser bikes are more suitable to shade tree mechanics.. perhaps more practice on a few of those..
For nearly all practical purposes "lesser" bikes are nearly identical mechanically.

Other external bearing cranksets also have premature wear issues where the bottom bracket shell is out of tolerance or has non-square faces.

Quote:
I reccomend using a Pro Level Bike Shop services.
I don't. This stuff is _not_ rocket science. The specialized tools you need (apart from cutting tools which may not be required and bearing presses which can be improvised) are relatively affordable and it's often (if not usually) less expensive to buy the tools and do the job yourself the first time than to pay a shop.

With a background in auto mechanics the original poster should already understand things like torque wrench accuracy and lubricating threads to avoid galling and galvanic corrosion.

It may be worth noting that not all torque wrenches click in reverse when tightening left handed threads like most drive side bottom bracket cups.

He can pickup everything else from manuals, the Park tool site, youtube, etc.

Last edited by Drew Eckhardt; 01-17-13 at 02:07 PM.
Drew Eckhardt 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 05:54 PM.