Go Back  Bike Forums > Bike Forums > Framebuilders
Reload this Page >

Cracked Lug-How serious!?

Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

Cracked Lug-How serious!?

Old 07-24-09, 10:50 PM
  #1  
rothenfield1
Senior Member
Thread Starter
 
rothenfield1's Avatar
 
Join Date: Jun 2009
Location: Montereyish
Posts: 2,329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Cracked Lug-How serious!?

I was just about to pull the trigger on putting some good money into this super nice chromed 90's Bianchi frame when I saw what looks like a crack in the downtube lug. IS THIS SERIOUS? PLEASE, PLEASE help a poor guy with a Bianchi dream out here!
Attached Images
File Type: jpg
P1010495.jpg (93.2 KB, 43 views)
File Type: jpg
P1010496.jpg (108.8 KB, 43 views)
File Type: jpg
P1010497.jpg (107.8 KB, 48 views)
File Type: jpg
P1010498.jpg (38.3 KB, 54 views)
rothenfield1 is offline  
Old 07-24-09, 11:31 PM
  #2  
Nessism
Senior Member
 
Nessism's Avatar
 
Join Date: Jun 2004
Location: Torrance, CA
Posts: 2,725

Bikes: Homebuilt steel

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 140 Post(s)
Liked 9 Times in 9 Posts
I wouldn't buy that frame.
Nessism is offline  
Old 07-25-09, 12:01 AM
  #3  
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 18,238
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 31 Times in 29 Posts
I would offer the guy $10 so I could rip that apart and figure out what the heck went wrong at Bianchi that day. That will eventually crack all around the headtube and fail completely. You can probably get a couple of years of riding out of it before it cracks completely.
unterhausen is offline  
Old 07-25-09, 12:22 AM
  #4  
rothenfield1
Senior Member
Thread Starter
 
rothenfield1's Avatar
 
Join Date: Jun 2009
Location: Montereyish
Posts: 2,329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I'm crying right now.
rothenfield1 is offline  
Old 07-25-09, 08:20 AM
  #5  
Scooper
Decrepit Member
 
Scooper's Avatar
 
Join Date: Aug 2005
Location: Santa Rosa, California
Posts: 10,491

Bikes: Waterford 953 RS-22, several Paramounts

Mentioned: 64 Post(s)
Tagged: 0 Thread(s)
Quoted: 616 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
That type of crack is typical of a frame having been brazed under tension resulting in built-in stresses. Over time, the stresses are relieved through failure of the tubing and/or lug.

HERE is an example of this kind of failure and its repair.
__________________
- Stan

my bikes

Science doesn't care what you believe.
Scooper is offline  
Old 07-26-09, 12:51 PM
  #6  
rothenfield1
Senior Member
Thread Starter
 
rothenfield1's Avatar
 
Join Date: Jun 2009
Location: Montereyish
Posts: 2,329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I contacted some frame repair shops, and it doesn't sound good. The concern is whether the tube is cracked as well as the lug. Also, because it is a chromed frame, the repair area will have to be de-chromed first. Here's another photo after I butchered the paint away.
Attached Images
File Type: jpg
P1010501.JPG (93.8 KB, 57 views)
rothenfield1 is offline  
Old 07-26-09, 01:12 PM
  #7  
rothenfield1
Senior Member
Thread Starter
 
rothenfield1's Avatar
 
Join Date: Jun 2009
Location: Montereyish
Posts: 2,329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
How much would you expect it to cost to have the head tube paint and chrome stripped, and the lug rebrazed?
rothenfield1 is offline  
Old 07-26-09, 06:09 PM
  #8  
Silverbraze 
Tell it as it is
 
Silverbraze's Avatar
 
Join Date: Nov 2005
Location: in a cave
Posts: 70

Bikes: ones that I ride

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by rothenfield1 View Post
I was just about to pull the trigger on putting some good money into this super nice chromed 90's Bianchi frame when I saw what looks like a crack in the downtube lug. IS THIS SERIOUS? PLEASE, PLEASE help a poor guy with a Bianchi dream out here!
if that lug is cracked
then it is nothing to do with tension etc
but really more about piss poor brazing.
It looks some of the lug is holding onto the tube and some it is letting go because the whole joint is not fully brazed and that is why the lug is tearing above the unbrazed portion.
It may look sweet because the man with the torch wet the shorelines
but it was Friday and he was meeting Maria at the bar and he was eager to ..............
or he was just lousy at his job.

Proper brazed joints do not fail like that
__________________
it's steel
it's lugs
let the others get on with the madness
www.llewellynbikes.com
www.framebuilders.org
Silverbraze is offline  
Old 07-26-09, 07:15 PM
  #9  
rothenfield1
Senior Member
Thread Starter
 
rothenfield1's Avatar
 
Join Date: Jun 2009
Location: Montereyish
Posts: 2,329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I'm going to call Reparto Course and demand they replace my frame, maybe with one of those new Ducatis.
rothenfield1 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Damien1993
Classic & Vintage
7
05-23-19 05:37 PM
Drillium Dude
Classic & Vintage
6
12-11-18 02:27 PM
p4nh4ndle
Bicycle Mechanics
5
08-18-08 09:54 PM
Dr.Deltron
Bicycle Mechanics
1
12-03-06 06:10 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.