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


Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 11-24-03, 10:08 AM   #1
SD Fixed
Traffic shark
Thread Starter
 
Join Date: May 2001
Location: California
Bikes: 2 fixies, 1 road, 29er in the works.
Posts: 4,612
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Frame failure to axle width..

So what to do?

Anyway, I called Cycleart about getting a paint job on the Bianchi I found, aside from pretty severe sticker shock (300 complete).. I got to talking with a really friendly gentleman there who discused some issues that plague older frames. Now, I'm not calling him a liar, or anything, but I'm a bit skeptical. So turn to my resources here:

He said that often when you put a different sized hub on the bike, esp when it's concerned with smaller widths, a bike frame can experience failures because of the "squeezing" in of the rear drop outs. He said he's seen numerous frames with this issue. Part of the service he provides includes correcting the frame for a better grab on the axle width (smaller if need be or larger).

I know I've simplfied this, but I'd like to know if anyone has had these problems, or if it's just an issue that is rare, but something that should be addressed at his level of "touch" on the bike.
SD Fixed is offline   Reply With Quote
Old 11-24-03, 11:54 AM   #2
Dave Stohler
60mph in the 42 ring!
 
Dave Stohler's Avatar
 
Join Date: Jul 2003
Location: Niagara Frontier, NY
Bikes:
Posts: 546
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I's true. If you don't have the proper dropout spacing for the hubs you want to run, you need to have them cold-set by a frame builder, and have the frame re-alligned.
Dave Stohler is offline   Reply With Quote
Old 11-24-03, 12:03 PM   #3
alexs
invisible
 
Join Date: Aug 2003
Bikes:
Posts: 154
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Dave Stohler
I's true. If you don't have the proper dropout spacing for the hubs you want to run, you need to have them cold-set by a frame builder, and have the frame re-alligned.
this is not really true.

In the words of the Authority on Fixed Gear Conversions (Sheldon Brown)... "In general, you can safely go up one size in spacing this way, just springing the frame apart. I can't give you an absolute guarantee that this won't cause damage, but the odds are very much in your favor."

Plenty of people do it this way without any issues.

William, the guy you were talking to sells a cold-setting service, so of course he thinks that cold-setting is required in every instance. By the way, selling a cold-setting service is pretty ******** on it's own, as you don't need to go to a frame builder or a professional to cold set your frame. If you want to do it yourself, all you need is a piece of wood. Again, gotta love sheldon: http://www.sheldonbrown.com/frame-spacing.html.
alexs is offline   Reply With Quote
Old 11-24-03, 12:24 PM   #4
SD Fixed
Traffic shark
Thread Starter
 
Join Date: May 2001
Location: California
Bikes: 2 fixies, 1 road, 29er in the works.
Posts: 4,612
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks! That link rocks too!

I've emailed them to ask them the cost of setting it strait..
SD Fixed is offline   Reply With Quote
Old 11-24-03, 12:37 PM   #5
roadfix
hello
 
roadfix's Avatar
 
Join Date: May 2003
Location: Los Angeles
Bikes:
Posts: 18,557
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Using my half-ton home gym as a jig or frame support, sort of, I've re-aligned & re-spaced several steel frames in the past with absolutely no problems.

George
roadfix is offline   Reply With Quote
Old 11-24-03, 12:47 PM   #6
SD Fixed
Traffic shark
Thread Starter
 
Join Date: May 2001
Location: California
Bikes: 2 fixies, 1 road, 29er in the works.
Posts: 4,612
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by The Fixer
Using my half-ton home gym as a jig or frame support, sort of, I've re-aligned & re-spaced several steel frames in the past with absolutely no problems.

George
That easy, eh? Hmmm...
SD Fixed is offline   Reply With Quote
Old 11-24-03, 12:53 PM   #7
streners
Senior Member
 
streners's Avatar
 
Join Date: Dec 2002
Location: Boston, MA /Cambridge, UK
Bikes:
Posts: 274
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I did mine the sheldon way with a chair and a 2by4, no problems yet. Unless it's a *really* nice frame I wouldn't worry about it, chances are by the time it fails you'll have another frame to obsess over, I know I will.
streners is offline   Reply With Quote
Old 11-24-03, 01:01 PM   #8
auk
Coasting makes you grumpy
 
Join Date: Oct 2003
Location: Indiana
Bikes: Specialized Stumpjumper M2Comp; Habanero Ti-Team; Slingshot Road; 1962 converted Raliegh fixer aka: The Beast
Posts: 1,376
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Here's another vote for "go for it". Did it a couple of times on the beast. Never a problem yet. Just have a plan and go slow. No yanking allowed.

Dave

Quote:
Originally Posted by William Karsten
That easy, eh? Hmmm...
auk is offline   Reply With Quote
Old 11-24-03, 01:04 PM   #9
legalize_it
legalize bikes
 
Join Date: May 2003
Location: bucks county, PA
Bikes: too damn many
Posts: 1,250
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
why not just space the hub/axle? if you only plan on running 1 gear (as opposed to a flip flop) whats wrong with just spacing putting spacers on the axle?
this is what ive done on more than one occasion...and it eliminates the need to cold set...
legalize_it is offline   Reply With Quote
Old 11-24-03, 01:06 PM   #10
Kev
Senior Member
 
Join Date: Nov 2001
Bikes:
Posts: 1,652
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think you could potentioly in long run suffer damage to the frame.. if you do not set the frame.. Now if going from 130mm dropouts to a 120hub I would not suggest it, but 126 to 120.. where talking 3mm on each side not alot. Better yet why not just space the hub out to 126 by adding two 3mm spacers.
Kev is offline   Reply With Quote
Old 11-24-03, 01:09 PM   #11
SD Fixed
Traffic shark
Thread Starter
 
Join Date: May 2001
Location: California
Bikes: 2 fixies, 1 road, 29er in the works.
Posts: 4,612
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Kev
I think you could potentioly in long run suffer damage to the frame.. if you do not set the frame.. Now if going from 130mm dropouts to a 120hub I would not suggest it, but 126 to 120.. where talking 3mm on each side not alot. Better yet why not just space the hub out to 126 by adding two 3mm spacers.
It seems like it would allow to much leverage on the axle, and the frame to put spacers in. I'm not 100% sure on this, but in would seem that way.
SD Fixed is offline   Reply With Quote
Old 11-24-03, 01:20 PM   #12
OneTinSloth
(Grouchy)
 
Join Date: Mar 2003
Bikes:
Posts: 3,643
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
if you have a friend at a bike shop, i'd reccommend you take it to them for the respacing/realignment and don't watch. it's scary...they take out the kilingon war tool (Frame Alignment Guage) and make your bike look like it's made out of rubber.
OneTinSloth is offline   Reply With Quote
Old 11-24-03, 01:47 PM   #13
riderx
BFSSFG old timer
 
riderx's Avatar
 
Join Date: Apr 2001
Location: Fredrock
Bikes:
Posts: 1,913
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by William Karsten
It seems like it would allow to much leverage on the axle, and the frame to put spacers in. I'm not 100% sure on this, but in would seem that way.
Nope. No worries. Just respace your hub and be done with it. I respaced a 120mm Surly hub to 126mm. Then, when I got a new Surly Crosscheck I spaced it out to 132mm (Surly's gnot-right spacing). No problems.
riderx is offline   Reply With Quote
Old 11-25-03, 07:26 AM   #14
jasonyates
Senior Member
 
Join Date: May 2003
Location: Chicago, IL
Bikes: Bianchi Pista, Miyata track, Schwinn Le Tour fixie
Posts: 373
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
When you guys say "frame failure" what do you mean? The rear triangle breaks off or something?

-Jason
jasonyates 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 05:04 PM.