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

Rear spacing - Can you stretch 120mm to 133mm?

Search
Notices
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.

Rear spacing - Can you stretch 120mm to 133mm?

Thread Tools
 
Search this Thread
 
Old 11-26-08, 12:39 PM
  #1  
insert witty comment here
Thread Starter
 
Mr_Christopher's Avatar
 
Join Date: Aug 2008
Location: Dallas Texas
Posts: 846

Bikes: 2016 Specialized AWOL, 2011 Electra Bike Ticino, '09 Trek 7.2 FX, Peugeot UE 18

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Rear spacing - Can you stretch 120mm to 133mm?

Or is that too big of a stretch? We're talking about a cromo frame.

Chris
Mr_Christopher is offline  
Old 11-26-08, 10:18 PM
  #2  
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,386
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,686 Times in 2,509 Posts
generally, yes
unterhausen is offline  
Old 11-27-08, 01:41 AM
  #3  
Banned
 
Join Date: Aug 2005
Posts: 5,115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times in 1 Post
Presumably you actually want to hit either 130 or 135. 133 is the midpoint so you can use either. You can bend the stays that much and get the wheel in, generally. You will need to reset the drops a little. From a frambuilding perspective this is kinda a hack job. My normal goal is to get things closer to an ideal. I would search out the proper hub, or get a different frame.
NoReg is offline  
Old 11-27-08, 07:44 AM
  #4  
insert witty comment here
Thread Starter
 
Mr_Christopher's Avatar
 
Join Date: Aug 2008
Location: Dallas Texas
Posts: 846

Bikes: 2016 Specialized AWOL, 2011 Electra Bike Ticino, '09 Trek 7.2 FX, Peugeot UE 18

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Point taken. Thanks

Chris
Mr_Christopher is offline  
Old 11-27-08, 02:07 PM
  #5  
Banned
 
Join Date: Aug 2005
Posts: 5,115
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times in 1 Post
Sorry to sound preachy, was just trying to get to the point that you can do it, comes up on the touring board all the time, and there the need for part replacement may trump other concerns. At the same time you are taking a risk that you will end up worse off than you started out.
NoReg is offline  
Old 11-28-08, 05:15 PM
  #6  
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,386
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,686 Times in 2,509 Posts
My answer assumes it's an older bike with 120mm spacing stock from the factory. Newer, thinner tubes may buckle. For whatever reason, while building a frame the rear spacing tends to shrink, so there is some likelihood that a frame has already been bent. 7mm per side on a robust steel tube is nothing. I recently had this discussion at my favorite bike shop. They were not amused by my position on the topic.

I've seen frames bent more than that, although thank goodness none of mine. If you search the internet for framebuilding pictures, you will probably find some pictures of buckled downtubes.
unterhausen is offline  
Old 11-28-08, 05:16 PM
  #7  
insert witty comment here
Thread Starter
 
Mr_Christopher's Avatar
 
Join Date: Aug 2008
Location: Dallas Texas
Posts: 846

Bikes: 2016 Specialized AWOL, 2011 Electra Bike Ticino, '09 Trek 7.2 FX, Peugeot UE 18

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Peterpan1
Sorry to sound preachy, was just trying to get to the point that you can do it, comes up on the touring board all the time, and there the need for part replacement may trump other concerns. At the same time you are taking a risk that you will end up worse off than you started out.
You didn't sound preachy at all, in fact you helped me come to my senses :-)

Chris
Mr_Christopher is offline  

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