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 10-03-06, 01:46 PM   #1
daneil
Senior Member
Thread Starter
 
Join Date: Apr 2004
Location: Brooklyn, NY
Bikes:
Posts: 255
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano BB-5500 Question

I have an Octalink 5500 bottom bracket that's feeling a little gritty. Doesn't make sense as it's only a few months old and has no real wear on it. I pull the BB and it looks like on the fixed cup side of the bb there's a small plastic dust cap looking thing that's been mangled (there's a whole one on the adjustable cup side as well). I pull the bit out and the bb now turns noislessly (although not quite as smoothly as I'd like. not a big fan of the cartridge bearings I guess.), I pull both off and it's smoother still. So the question is am I going to have problems if I reinstall the bb without the dust cap looking bits? I'm going to give the threads and spindle a nice coat of Phils grease before I put her back in, just want to know if I'm going to have problems down the road.
daneil is offline   Reply With Quote
Old 10-03-06, 02:12 PM   #2
tuck
truthiness detector
 
Join Date: Sep 2006
Bikes:
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
that's the shimano 105 bb right? I just put one of those in my bike and Im trying to remember the dust cap thing and cant recall it?
tuck is offline   Reply With Quote
Old 10-03-06, 02:23 PM   #3
daneil
Senior Member
Thread Starter
 
Join Date: Apr 2004
Location: Brooklyn, NY
Bikes:
Posts: 255
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah, it's the 105 Octalink BB. Here's a question...Does your BB seem a little stiff compared to the to older non sealed cartridge bearing BB's? I seem to remember my older UN-52 spinning much more freely than the 5500 seems to.
daneil is offline   Reply With Quote
Old 10-03-06, 05:19 PM   #4
capwater
Senior Member
 
capwater's Avatar
 
Join Date: Dec 2004
Location: Quahog, RI
Bikes: Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
Posts: 1,509
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Does it seem stiff when you scrutinize it endlessly on your bike stand or is it stiff when you're actually riding? They are great BBs and super cheap these days, 15 bucks from Nashbar. Sure, it might be a bit rougher than Ultegra, but you won't notice it whilest riding.
capwater is offline   Reply With Quote
Old 10-03-06, 08:18 PM   #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: 28,847
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Quote:
Originally Posted by daneil
Yeah, it's the 105 Octalink BB. Here's a question...Does your BB seem a little stiff compared to the to older non sealed cartridge bearing BB's? I seem to remember my older UN-52 spinning much more freely than the 5500 seems to.
UN-52 and their slightly upmarket UN-72/73 brethren were all sealed bottom brackets too. They had square tapered spindles, not the Octalink splined crank interface, but they were sealed.
HillRider is offline   Reply With Quote
Old 10-03-06, 08:37 PM   #6
TallRider
me have long head tube
 
TallRider's Avatar
 
Join Date: Oct 2005
Location: Chapel Hill, NC
Bikes:
Posts: 4,106
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are you exposing the bearings when you pull the plastic dust cap off, or are you referring to the non-drive-side plastic thing that threads into the frame to hold the BB from shifting around in the frame's bottom bracket shell?

Also, word is that square-taper sealed-cartridge BB's usually run with lower drag than comparable-quality sealed-cartridge oversized-hollow-axle BB's.
TallRider is offline   Reply With Quote
Old 10-03-06, 09:50 PM   #7
tvphobic
Senior Member
 
Join Date: May 2004
Bikes:
Posts: 359
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have a BB-5500 with only 1100 miles on it, and the drive side seal itself is completely gritty and noisy.
I have futzed with it a great deal and concluded, based on the frequency of the noise per revolution that there is not much grit in there but that a small amount makes a big difference. Since reading this post I tried to pry the right side seal out with a tiny screwdriver and could not do it. I was wondering if I might get a few more miles out of it if the grit is in fact confined to the seal itself and has not made it into the bearing. My RS seal does NOT look mangles at all, it looks mint.

It is worth noting that I have never had a BB become degraded even this far until nearly 3000 miles, including a very cheap BB-LP28, which is a very low-precision boat anchor of a BB, but rolled OK for longer than the BB-5500. My Campag AC-H has 4700-ish on it and is smooth as silk though I upgraded to true Centaur recently.

Last edited by tvphobic; 10-04-06 at 11:13 PM.
tvphobic 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 05:06 AM.