Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

What is this? Weird frame nub content...

Search
Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

What is this? Weird frame nub content...

Thread Tools
 
Search this Thread
 
Old 04-28-12 | 01:17 PM
  #1  
The MAX's Avatar
Thread Starter
Senior Member
 
Joined: Mar 2010
Posts: 309
Likes: 1

Bikes: Surly Long haul Trucker with front and rack Nice Racks, 1984 Colnago Sport, 1983 Raleigh Condor

What is this? Weird frame nub content...

So I just finished fixing up a 92 (I think) Giant Yukon. Nothing real top of the line, but a solid bike, and will make a great commuter for someone.



And I noticed this weird braze-on/nub on the non drive side chain stay. Never seen one before and can't even imagine what it might be for. Any ideas? I thought it might be something to do with the quick release lever, but the lever doesn't even touch it.

The MAX is offline  
Reply
Old 04-28-12 | 02:53 PM
  #2  
Captain Blight's Avatar
Senior Member
 
Joined: Oct 2009
Posts: 2,470
Likes: 5
From: Minneapolis

Bikes: -1973 Motobecane Mirage -197? Velosolex L'Etoile -'71 Raleigh Super Course

That is weird. When you figure it out be sure to let us know.
Captain Blight is offline  
Reply
Old 04-28-12 | 03:15 PM
  #3  
Senior Member
 
Joined: Dec 2010
Posts: 6,682
Likes: 4
From: Above ground, Walnut Creek, Ca

Bikes: 8 ss bikes, 1 5-speed touring bike

might be a fixture for a proprietary rack, or maybe a fancy mounting point for the brake arm of a coaster brake hub... IDK.
hueyhoolihan is offline  
Reply
Old 04-28-12 | 05:02 PM
  #4  
Grand Bois's Avatar
Senior Member
 
Joined: Mar 2005
Posts: 17,392
Likes: 40
From: Pinole, CA, USA
I'm stumped, but very curious. Clean up the rust on that QR before you try to sell it!
Grand Bois is offline  
Reply
Old 04-28-12 | 05:08 PM
  #5  
brian3069's Avatar
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Jun 2009
Posts: 1,747
Likes: 211

Bikes: Raleigh Supercourse

I have the identical bike, never notice that.
brian3069 is offline  
Reply
Old 04-28-12 | 05:38 PM
  #6  
Senior Member
 
Joined: Sep 2006
Posts: 281
Likes: 0
From: Lakeland, Fl
I'm guessing an anti-rotational nub for a rear kick stand, but that's a guess.
bobdell is offline  
Reply
Old 04-28-12 | 07:13 PM
  #7  
Senior Member
20 Anniversary
Community Builder
 
Joined: Jun 2006
Posts: 21,876
Likes: 3,757
Originally Posted by bobdell
I'm guessing an anti-rotational nub for a rear kick stand, but that's a guess.
I agree with that conjecture.
repechage is offline  
Reply
Old 04-28-12 | 08:31 PM
  #8  
Fenway's Avatar
Senior Member
 
Joined: Sep 2009
Posts: 424
Likes: 1
From: Boston, MA

Bikes: 1983 Peugeot UO14, KHS Green-Heavily modified, 1972 Raleigh Sprite 27" (work in progress)

Would make sense with the two bolt holes in that dropout.
Fenway is offline  
Reply
Old 04-29-12 | 03:06 AM
  #9  
pastorbobnlnh's Avatar
Freewheel Medic
Titanium Club Membership
Sheldon Brown Memorial - Titanium
20 Anniversary
 
Joined: Oct 2005
Posts: 13,578
Likes: 3,329
From: An Island on the Coast of GA!

Bikes: Snazzy* Schwinns, Classy Cannondales & a Super Pro Aero Lotus (* Ed.)

I'm guessing a mounting and anti rotational nub for a disc brake system.
__________________
Bob
Enjoying the GA coast all year long!

Thanks for visiting my website: www.freewheelspa.com





pastorbobnlnh is offline  
Reply
Old 04-29-12 | 05:39 AM
  #10  
Bianchigirll's Avatar
Bianchi Goddess
Titanium Club Membership
15 Anniversary
Community Builder
 
Joined: Apr 2009
Posts: 28,976
Likes: 4,247
From: Shady Pines Retirement Fort Wayne, In

Bikes: Too many to list here check my signature.

I think that bike is too old for a brazeon for a disc brake. I lik the Kickstand idea or maybe something for a kid trailer?
__________________
One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"

Sugar "Kane" Kowalczyk
Bianchigirll is offline  
Reply
Old 04-29-12 | 08:01 AM
  #11  
Grim's Avatar
Senior Member
 
Joined: Jun 2008
Posts: 2,978
Likes: 4
From: Atlanta

Bikes: Cannondale T700s and a few others

Was the frame assembled in a automated welder? Might be for indexing purposes.
Grim is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
chaadster
Road Cycling
71
01-13-15 11:20 AM
bunman
Bicycle Mechanics
10
02-27-12 10:19 AM
Bodeco
Bicycle Mechanics
2
10-17-10 12:58 AM
KtownDougie
Singlespeed & Fixed Gear
17
10-16-10 12:59 PM
CamelDane
Bicycle Mechanics
1
01-30-10 03:22 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



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

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.