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

Opinion on front impact damage and possibly ID help

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.

Opinion on front impact damage and possibly ID help

Old 05-20-12, 02:50 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Dec 2007
Posts: 150
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Likes: 0
Liked 6 Times in 6 Posts
Opinion on front impact damage and possibly ID help

Hi there,

Before I go about building up this nice frame here I'd like to hear what people think about the relevance (or not) of a slight frontal damage.
The fork is original (matching serial number, matching drop outs, matching residual paint) and is perfectly straight. The frame is also perfectly straight as far as I can tell with my frame gauge. It just has that typical compression ring on the underside of the down tube just behind the head tube. Would that make the steerer angle marginally steeper or not even that? Would it make the frame less stiff? Is it more likely now that I get speed wobbles?
What do you think?


In terms of ID I'd also appreciate any guess.
It's a 54 cm frame (seat tube c-t) with a 54.5 cm top tube c-c.
Angles are 74/74 with Bocama lugs.
Bottom bracket and fork have a 4 digit serial number (3743). BB shell in British.
ISO head set (26.4 mm crown race and 30.2 mm cups).
The frame weighs only 1,725g which makes me think 531 professional (or even 753).
Fork blades are stmped "Reynolds 531 Butted" and weighs 650g.
27.2mm seat post
Drop outs are Columbus.
126mm rear spacing.
Bosses for two bottle cages and frame pump peg on steerer tube.
Looks like late 80s or early 90s to me. Probably British but maybe something local here in Perth, Australia?
Any ideas?

More pics:


Many thanks for you help and advice.
Cheers,
Guido
Attached Images
File Type: jpg
DSC02438.jpg (95.6 KB, 47 views)
File Type: jpg
DSC02439.jpg (99.2 KB, 44 views)
File Type: jpg
DSC02441.jpg (98.7 KB, 47 views)
File Type: jpg
DSC02443.jpg (93.2 KB, 42 views)
File Type: jpg
DSC02444.jpg (96.3 KB, 38 views)
File Type: jpg
DSC02445.jpg (103.0 KB, 32 views)
File Type: jpg
DSC02446.jpg (104.0 KB, 36 views)
File Type: jpg
DSC02447.jpg (95.8 KB, 33 views)
File Type: jpg
DSC02448.jpg (93.5 KB, 33 views)
File Type: jpg
DSC02449.jpg (99.2 KB, 30 views)

Last edited by guidogad; 05-20-12 at 02:57 AM.
guidogad is offline  
Old 05-20-12, 09:33 AM
  #2  
curmudgineer
 
old's'cool's Avatar
 
Join Date: Dec 2009
Location: Chicago SW burbs
Posts: 4,429

Bikes: 2 many 2 fit here

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 263 Post(s)
Liked 111 Times in 70 Posts
Downtube evidently gimballed... at the very least, that will alter the tracking and stability characteristics from what they were originally, probably for the worse. The tube may be weakened, but it's hard to say whether seriously or not. I don't know if that can be repaired; we may get some framebuilders chiming in with their opinions about that.
Other than that and the corrosion, looks like a damn nice frame.
old's'cool is offline  
Old 05-20-12, 09:39 AM
  #3  
Senior Member
 
auchencrow's Avatar
 
Join Date: Apr 2009
Location: Detroit
Posts: 10,327
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Likes: 0
Liked 39 Times in 31 Posts
Interesting frame, Guido, but I cannot offer a guess on the ID.

I do think the damage to the frame is substantial, and will alter the ride/handling characteristics of the bike. I had a frame exhibiting less distortion about the HT, but there was still a significant change in the angle.

I would suggest you commandeer someone in possession of a Park HTS-1, to straighten the frame for you before you build it. It looks like a frame worthy of the effort.
__________________
- Auchen
auchencrow is offline  
Old 05-20-12, 11:45 AM
  #4  
Newbie
 
Join Date: Jul 2007
Posts: 52

Bikes: ‘09 Ibis Silk SL, ‘08 Cannondale Synapse, ‘97 Cannondale R300, '96 CKC, '91 Batt., '86 Simoncini Cromor, '85 Allez, '78 PX10, '76 Gran Jubile, '73 Arctic, '73 Interclub, '72 TdF, '71 PX10, '70 Mondia SS, ‘90 Basso Paris Roubai

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 6 Times in 3 Posts
I had a 531 frame with similar damage. I took the frame to well-known frame builder. He clamped a weird set of metal braces (apparently of his own devising) to the frame and then we both applied slow but heavy pressure. The idea was to pull the frame back into its original alignment.

The repair seemed to work, although neither of us is sure it was 100% effective. The frame builder's comment was that the frame was road worthy, but to avoid heavy duty use and inspect frequently. That was 14 years ago. I ride the frame regularly, although not on rough roads if I can help it. Rides fine and the repair has held up.
BluePx10 is offline  
Old 05-20-12, 10:16 PM
  #5  
Senior Member
Thread Starter
 
Join Date: Dec 2007
Posts: 150
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Likes: 0
Liked 6 Times in 6 Posts
Somehow I had hoped more for a 'don't worry and ride, there will be no difference'.
In terms of frame alignment it all seems to check out. The only thing I can't really assess is the steerer angle.
Here is another shot right from the side. To me that doesn't look to bad:


I might just put it to a test on the road as it is before sandblasting and powdercoating it.
Attached Images
File Type: jpg
DSC02450.jpg (97.7 KB, 20 views)
guidogad is offline  
Old 05-20-12, 10:40 PM
  #6  
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Posts: 28,486

Bikes: https://www.theheadbadge.com

Mentioned: 121 Post(s)
Tagged: 0 Thread(s)
Quoted: 2395 Post(s)
Liked 4,332 Times in 2,069 Posts
Put it in a Park HTS-1 and add a bit of torque to the headtube. Should take out most of what remains of the ripple, but not enough to be satisfactory.

It reminds me of a mid-1980's Falcon frame. Not identical, but Falcon used Columbus rear drops. They were very much parts-bin builds, hence why I haven't given the slightly differing headlugs and different fork crown much extra scrutiny.

FROM: https://velobase.com/Velos/ViewModel....71efa&Enum=201


-Kurt
__________________













Last edited by cudak888; 05-20-12 at 10:59 PM.
cudak888 is offline  
Old 05-20-12, 10:46 PM
  #7  
Senior Member
 
Join Date: Mar 2007
Posts: 6,401
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 13 Times in 13 Posts
Out of curiosity, is that you who's been at the frame with a rotary tool?
Six jours is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
francophile
Classic & Vintage
13
06-07-16 01:53 PM
PiLigand
Road Cycling
27
05-30-14 09:56 AM
LCTexas
Classic & Vintage
13
05-23-14 05:05 PM
Triggeroo
Classic & Vintage
11
03-13-14 08:28 AM
polobreaka
Singlespeed & Fixed Gear
8
10-08-10 09:34 AM

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


Thread Tools
Search this Thread

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

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.