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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-18-07, 10:29 AM   #1
bfromcolo
Senior Member
Thread Starter
 
bfromcolo's Avatar
 
Join Date: Feb 2007
Location: Monument, Colorado
Bikes:
Posts: 379
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How to make a cheap shim?

Just a bit of advice please. My old Schwinn has a 1" seat tube. My front derailler is a lost cause. I have a derailler made for a 1 1/8" seat tube I would like to use. So I need a shim for 25.4 to 28.6 mm. I have found them online but with shipping it would cost me $15 to solve this minor issue. Any ideas on how to make my own cheap?

Thanks
bfromcolo is offline   Reply With Quote
Old 05-18-07, 11:34 AM   #2
neil0502
My bike's better than me!
 
neil0502's Avatar
 
Join Date: Feb 2005
Location: Northern Colorado
Bikes: (2) Moots Vamoots, (1) Cannondale T2000 tourer, (1) Diamondback Response Comp mtb
Posts: 2,041
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Cut pieces of a beer can. Stack as necessary.
neil0502 is offline   Reply With Quote
Old 05-18-07, 11:39 AM   #3
vpiuva
*
 
vpiuva's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 3,458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you have an old inner tube cut it to fit.
vpiuva is offline   Reply With Quote
Old 05-18-07, 12:04 PM   #4
kandnhome
Unemplawyer
 
Join Date: Aug 2004
Location: The Natural State
Bikes: 2006 21" Rockhopper
Posts: 459
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by vpiuva
If you have an old inner tube cut it to fit.
Exactly. Compresses to fit perfectly, and if applied to a clean frame, will not mar the finish.
kandnhome is offline   Reply With Quote
Old 05-18-07, 12:07 PM   #5
old and new
Senior Member
 
Join Date: Mar 2007
Bikes:
Posts: 3,134
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Both OK ideas. Macine shops keep "shim stock " on hand. I did in machine shops I had. If you're too random with the material,you could end -up with an impossibly stuck post N/G, we read about that plenty here at the forum. "feathered shim" is N/G either,it's tapered. Shim stock, sumtotal of twelve thousanths will do. Cold -rolled copper tubing is about that thickness,a plummer would have a piece,a can's too thin.
old and new is offline   Reply With Quote
Old 05-18-07, 06:42 PM   #6
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,535
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 57 Post(s)
It's been a couple of decades but I think that I remember solving that problem by using Velox handlebar tape. The hardest part was figuring exactly how high the derailleur had to be before wrapping the handlebar tape around the seat tube.
Retro Grouch 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 05:07 PM.