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 02-17-06, 05:18 PM   #1
limmiwinks23
Member
Thread Starter
 
Join Date: Jan 2006
Bikes:
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BB problems

i put a used BB on my nashbar atb frame(18") and it wont screw in all the way, it sticks out of the frame, how do i know what size i need? it only says 68mm but thats the diameter right?
limmiwinks23 is offline   Reply With Quote
Old 02-17-06, 05:39 PM   #2
cyclotoine
Senior Member
 
cyclotoine's Avatar
 
Join Date: Jul 2004
Location: Yukon, Canada
Bikes:
Posts: 8,519
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
68 is the width of the BB shell on you bike, an ATB should take a 73mm. either way I don't know why it isn't screwing in all the way. At 68 should fit but then you will have the left pedal too close to the frame and possibly rubbing. how much is it sticking out? did you clean the threads well?
cyclotoine is offline   Reply With Quote
Old 02-17-06, 09:52 PM   #3
limmiwinks23
Member
Thread Starter
 
Join Date: Jan 2006
Bikes:
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
how do i clean the bb shell??, no i mean the frame specs say 68mm and it threads in until it just stops
limmiwinks23 is offline   Reply With Quote
Old 02-18-06, 12:03 AM   #4
mx_599
Lost in the Black Hills
 
mx_599's Avatar
 
Join Date: May 2005
Bikes:
Posts: 5,725
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by limmiwinks23
how do i clean the bb shell??, no i mean the frame specs say 68mm and it threads in until it just stops
mine sticks out too. as long as it is tight, its okay
mx_599 is offline   Reply With Quote
Old 02-18-06, 01:39 AM   #5
limmiwinks23
Member
Thread Starter
 
Join Date: Jan 2006
Bikes:
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
well, it wont go into the 3rd ring....??
limmiwinks23 is offline   Reply With Quote
Old 02-18-06, 10:56 AM   #6
mx_599
Lost in the Black Hills
 
mx_599's Avatar
 
Join Date: May 2005
Bikes:
Posts: 5,725
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by limmiwinks23
well, it wont go into the 3rd ring....??
oh, i thought you meant the non drive side. well, take it out. use a metric ruler and visually inspect/measure the threaded distance on the cup and then the threads on the frame. ask yourself, "are there enough threads in the frame for this cup to seat all the way??"

if yes, then make sure both threads are clean like the above poster said. make sure no crushed threads are evident...this will surely cause resistance.

put a light lubricant on and try again. you might have simply hit a "false" tightness....and just need to put more torque into it assuming what i said above all checks out.
mx_599 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 12:26 AM.