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

Go Back   > >

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.

User Tag List

Thread Tools Search this Thread
Old 07-29-14, 03:19 PM   #1
Have bike, will travel
Thread Starter
Barrettscv's Avatar
Join Date: Feb 2006
Location: Edwardsville, Illinois
Bikes: De Rosa Super Prestige, Colnago Nuova Mexico, Eddy Merckx Corsa Extra, Pinarello Gavia, Schwinn Paramount, Motobecane Grand Record, Peugeot PX10, Serotta Nova X, Simoncini Cyclocross Special, Origin8 monstercross, Pedal Force CG2 and CX2
Posts: 10,666
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 99 Post(s)
126mm dropouts cold set to 135, opinions?

I have a 1988 Miyata 615 touring bike. I'd like to update the bike with modern 135mm touring wheels.

The Miyata has longer 445mm chainstays and is a heavier touring frame, by 1988 standards.

There are a couple of professional frame builders in my area who could cold set the rear triangle and correctly align the frame.

The question is: will the frame survive the bending with 100% integrity?
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
Barrettscv is online now   Reply With Quote
Old 07-29-14, 04:03 PM   #2
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 14,731
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
that shouldn't be a problem. I've gone further than that without issue

It was really common at one point to go from 120 to 130, and I've never seen anyone reporting an issue with that. Later bikes with heat treated tubing may well have a problem
unterhausen is offline   Reply With Quote
Old 07-30-14, 06:01 PM   #3
Senior Member
squirtdad's Avatar
Join Date: Jul 2006
Location: San Jose (Willow Glen) Ca
Bikes: '89 Miyata 1400, '82 nishiski, 84 Torpado super strada (Cino someday)
Posts: 4,180
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
I used the sheldon brown 2x4 method to coldset a a nishiki to I don't see a problem.... assuming you are talking steel frame..... 4.5 mm per side so about 3/16 " on each side
Looking for Torpado Superlight 58cm
squirtdad is offline   Reply With Quote
Old 07-30-14, 07:30 PM   #4
Mark Kelly 
Senior Member
Mark Kelly's Avatar
Join Date: Oct 2009
Location: Willy, VIC
Posts: 644
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
According to this catalogue the 1988 615 is made from triple butted CrMo tubing. They make no mention of it being heat treated so you should be fine.
Mark Kelly is offline   Reply With Quote
Old 07-30-14, 07:59 PM   #5
Andrew R Stewart 
Andrew R Stewart
Andrew R Stewart's Avatar
Join Date: Feb 2012
Location: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder
Posts: 6,949
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
The most likely bad thing is that the brake bridge will break loose from a stay. But these frames were brass brazed and with that the joint strength is high and the heat affected zone is large. So I doubt that there will be an issue. The drops will need realigning after the spread. Andy.
Andrew R Stewart is offline   Reply With Quote
Old 07-30-14, 11:13 PM   #6
Senior Member
Join Date: Jul 2011
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
It is done a lot, and usually with a lot less care than you are proposing.

I don't really like it from a framebuilding perspective. If I had an old jig that had a 126 rear spread on it, and said no problem I can just bend the frames to 135, I don't think most builder would think that was a great way to proceed. If I did that, I could build closer to the final dimensions than spreading an old frame. So if as a group we stand for making things with greater care than this shortcut implies, why are we the place to ask about this kind of thing, and why would we hand out the advice? Leave it to the guys with the 2x4s.
MassiveD is offline   Reply With Quote
Old 07-31-14, 07:54 AM   #7
Dave Kirk 
Senior Member
Join Date: Sep 2006
Location: Bozeman MT
Bikes: Kirk
Posts: 200
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think you'd be fine.

Dave Kirk is offline   Reply With Quote
Old 08-01-14, 09:48 AM   #8
Collector of Useless Info
Join Date: Aug 2009
Posts: 1,408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
No problem- I believe the 615 had "mangalloy" stays, which take cold setting a lot easier than Chrome-moly.
cycle_maven is offline   Reply With Quote

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 06:21 PM.