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 01-19-04, 08:40 AM   #1
cokes&spokes
Newbie
Thread Starter
 
Join Date: Jan 2004
Location: Miami, Florida USA
Bikes: (2) Lemond Zurichs 59cm w/Ultegra & Rolf Wheels (Comps & Pros), Trek Y-Foil frame Yellow Lg, Trek 850 MTB w/ early Dieore 6 spd, Gueciotti steel frame 58cm (for sale), Look Kevlar Hinault KG ? w/campy friction (for sale)
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ultegra BB 6500 Post-Install Question

I installed a new Ultegra 6500 BB in a Lemond Zurich frame. The axle seems to be running a little rougher than it did before the install (there seems to be a little more compression on the bearings).
With the crank arms on, it seems real smooth though. I tried loosening the cartrige from the drive-side after loosening the opposite cup and then retightening it just snug. Then I retightened the opposite cup with same result. Is this a normal situation (i.e. something like a break-in period will be needed) or could this slight roughness cause damage to the BB?
cokes&spokes is offline   Reply With Quote
Old 01-19-04, 08:55 AM   #2
tommy2pants
Senior Member
 
Join Date: Oct 2003
Bikes:
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by cokes&spokes
I installed a new Ultegra 6500 BB in a Lemond Zurich frame. The axle seems to be running a little rougher than it did before the install (there seems to be a little more compression on the bearings).
With the crank arms on, it seems real smooth though. I tried loosening the cartrige from the drive-side after loosening the opposite cup and then retightening it just snug. Then I retightened the opposite cup with same result. Is this a normal situation (i.e. something like a break-in period will be needed) or could this slight roughness cause damage to the BB?
Maybe the BB shell needs facing.If it's not square,it can put a bind on the BB. However that just typically causes increased resistance,not roughness.Tighten the driveside properly and try not quite so tight on the nondrive side and see what happens. Didn't you like the answer you got somewhere else?
tommy2pants is offline   Reply With Quote
Old 01-20-04, 10:07 PM   #3
cokes&spokes
Newbie
Thread Starter
 
Join Date: Jan 2004
Location: Miami, Florida USA
Bikes: (2) Lemond Zurichs 59cm w/Ultegra & Rolf Wheels (Comps & Pros), Trek Y-Foil frame Yellow Lg, Trek 850 MTB w/ early Dieore 6 spd, Gueciotti steel frame 58cm (for sale), Look Kevlar Hinault KG ? w/campy friction (for sale)
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by tommy2pants
Maybe the BB shell needs facing.If it's not square,it can put a bind on the BB. However that just typically causes increased resistance,not roughness.Tighten the driveside properly and try not quite so tight on the nondrive side and see what happens. Didn't you like the answer you got somewhere else?
I liked the answer I got somewhere else and thanked that person for their
assistance and I thank you for yours. Do you know if the "hydrolic" resistance
on the axle should differ at all from what it is before the tightening process?
Can you quantify that say on a 1-10 scale with 1 being the resistance before
installation. I haven't replaced one of these before so I would find this info
very helpful. Also if the resistance where such that I could feel the bearings
rotating through the axle somewhat, what might the likelyhood be that I would
damage the unit. The unit spins real smooth with the cranks on but I was wondering if that can be misleading.
Again, Thank you for your help!
cokes&spokes 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 04:51 AM.