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 09-05-11, 09:48 AM   #1
FruityBikini
Newbie
Thread Starter
 
Join Date: Aug 2011
Bikes:
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Bottom Bracket Issues

Hi

I've recently bought an old racing bike (probably mid 80s)
Im doing it up and have have removed to original bottom bracket, which wasn't a sealed unit.

Im buying a new bottom bracket but i'm not sure what axel width to get. The axel on the original bike was 150mm long. Would a new Shimano UN26 or UN54 with a 113mm axel be ok? Or would i need one as long as the original?

Thanks

J
FruityBikini is offline   Reply With Quote
Old 09-05-11, 09:55 AM   #2
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Bikes:
Posts: 2,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
are you measuring to the end of the studs or the square shoulders? the studs dont count. i would use a similar length
reptilezs is offline   Reply With Quote
Old 09-05-11, 09:59 AM   #3
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,920
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
If the spindle has threaded stubs sticking out of each end and the cranks are held by nuts, then reptilezs is correct. Ignore the threaded stubs and measure from the ends of the square tapers.
HillRider is offline   Reply With Quote
Old 09-05-11, 10:12 AM   #4
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 16,537
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)


Dimensions A, B, C, and D should match those of the original spindle as closely as possible.
JohnDThompson is offline   Reply With Quote
Old 09-05-11, 11:41 AM   #5
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,920
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
Quote:
Originally Posted by JohnDThompson View Post


Dimensions A, B, C, and D should match those of the original spindle as closely as possible.
The individual dimensions A,B and C are not selectable on a cartridge. You need to match D and the effect of A and C are only useful if the bb is not symetrical.
HillRider 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 03:20 PM.