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 01-21-10, 12:58 PM   #1
ls0725
Senior Member
Thread Starter
 
ls0725's Avatar
 
Join Date: Oct 2009
Location: SoCal
Bikes:
Posts: 495
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano BB question

i have been checking on Shimano bottom bracket types and noted that there is a Hollowtech and an Octalink. Are they the same thing? What is the difference between the 2 if ever not the same?

Do they use the same tools to remove/install?

Thanks replies to the newbie question.
ls0725 is offline   Reply With Quote
Old 01-21-10, 01:42 PM   #2
kycycler
Senior Member
 
Join Date: Mar 2007
Location: Louisville, KY
Bikes: Trek Madone 5.5, Klein Q Pro Elite, Surley LHT
Posts: 469
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Easy answer is NO they are not the same. For hollowtech you need a hollowtech crank. The octoliink is a cartridge type bb. For this type you need a crank set that is compatible.
kycycler is offline   Reply With Quote
Old 01-21-10, 03:17 PM   #3
CACycling
Senior Member
 
CACycling's Avatar
 
Join Date: Feb 2008
Location: Oxnard, CA
Bikes: '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
Posts: 4,565
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
In Octolink, the spindle is part of the BB (much like a traditional square taper BB). In Hollowtech, the spindle is part of the crankset.
CACycling is offline   Reply With Quote
Old 01-21-10, 03:33 PM   #4
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ls0725 View Post
i have been checking on Shimano bottom bracket types and noted that there is a Hollowtech and an Octalink. Are they the same thing? What is the difference between the 2 if ever not the same?

Do they use the same tools to remove/install?

Thanks replies to the newbie question.
Octalink is like a square taper shimano cart bb except the square taper is a splined interface. Hollowtech is an external bottom bracket design. Cranks and bbs are not interchangeable between the two.
operator is offline   Reply With Quote
Old 01-21-10, 03:41 PM   #5
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,088
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Keep in mind, there were Octalink cranks that were Hollowtech. The "hollowtech"name means the crankarms are hollow more or less, some fancy Shimano tech. Hollowtech II is the next generation and are external bearing-

Last edited by well biked; 01-21-10 at 03:50 PM.
well biked is offline   Reply With Quote
Old 01-21-10, 04:06 PM   #6
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by well biked View Post
Keep in mind, there were Octalink cranks that were Hollowtech. The "hollowtech"name means the crankarms are hollow more or less, some fancy Shimano tech. Hollowtech II is the next generation and are external bearing-
Op is talking about hollowtech bb's, I don't think any of those were external?
operator is offline   Reply With Quote
Old 01-21-10, 04:14 PM   #7
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,088
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Quote:
Originally Posted by operator View Post
Op is talking about hollowtech bb's,
Ah, I see. The OP should disregard what I said unless there's confusion between "Hollowtech Octalink" cranksets that use Octalink bb's, and Hollowtech II cranksets that use the external bearings.
well biked is offline   Reply With Quote
Old 01-21-10, 04:42 PM   #8
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hollowtech II is external.

Hollowtech (I) is Octalink (the axle of which is hollow).
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 01-21-10, 06:21 PM   #9
davidad
Senior Member
 
Join Date: Feb 2009
Bikes:
Posts: 4,896
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Poke around in here. Look for the part break down drawings. http://techdocs.shimano.com/techdocs/index.jsp
davidad 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 01:16 PM.