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 04-29-07, 03:45 PM   #1
Sincitycycler
Senior Member
Thread Starter
 
Sincitycycler's Avatar
 
Join Date: Mar 2005
Location: "Gosh honey, you pass more like Tony Rominger..."
Bikes: 2005 Scott CR1 Pro - 1992 Panasonix Fixed Conversion 60tx20t
Posts: 3,219
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Road/fixie conversion: What bb spindle length to use?

I'm looking at some old steel Schwinn frames on ebay to make into a fixed gear.
How do you determine if you need a 68x103 or 68x108, etc. in the bottom bracket?
__________________
"How did all those 'Keep Off the Grass' signs get there?"
Sincitycycler is offline   Reply With Quote
Old 04-29-07, 03:50 PM   #2
roadfix
hello
 
roadfix's Avatar
 
Join Date: May 2003
Location: Los Angeles
Bikes:
Posts: 18,589
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Spindle length (103 vs 108) is mostly determined by the crankset.
roadfix is offline   Reply With Quote
Old 04-29-07, 05:11 PM   #3
tellyho
Your mom
 
Join Date: Aug 2006
Bikes:
Posts: 2,541
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Choose a crankset, use its designated BB spindle length.
tellyho is offline   Reply With Quote
Old 04-29-07, 06:13 PM   #4
Sheldon Brown
Gone, but not forgotten
 
Sheldon Brown's Avatar
 
Join Date: Jul 2002
Location: Newtonville, Massachusetts
Bikes: See: http://sheldonbrown.org/bicycles
Posts: 2,301
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by roadfix
Spindle length (103 vs 108) is mostly determined by the crankset.
Spindle length is EXCLUSIVELY determined by the crankset and the desired chainline.

See: http://sheldonbrown.com/bbsize

and: http://sheldonbrown.com/chainline

Sheldon "Numbers" Brown
Code:
+----------------------------------------------------------------+
|  Most things having to do with fixed-gear/SS are bone stupid,  |
|  and folks who usually work on modern bikes aren't used to     |
|  thinking at that caveman level.             -- Aaron Meberg   |
+----------------------------------------------------------------+
Sheldon Brown 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 01:08 AM.