Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-27-06, 08:49 PM   #1
odie91
Senior Member
Thread Starter
 
Join Date: Sep 2006
Bikes:
Posts: 223
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BB - square taper vs. splined

is one considered better than the other? (especially for ss/fg purposes)?
odie91 is offline   Reply With Quote
Old 12-27-06, 08:51 PM   #2
Retem
Paste Taster
 
Retem's Avatar
 
Join Date: May 2006
Location: Sacramento, CA
Bikes: , Jury Bike, Moto Outcast 29, Spicer standard track frame and spicer custom steel sprint frame.
Posts: 4,392
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I like both da and fsa but not truvativ
Squares are old school and I have some that are 30+ years old and they are still buttery smooth
Retem is offline   Reply With Quote
Old 12-27-06, 09:35 PM   #3
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 odie91
is one considered better than the other? (especially for ss/fg purposes)?
For conversion purposes, square taper FTW.
operator is offline   Reply With Quote
Old 12-28-06, 06:03 PM   #4
soze
ex-everything.
 
soze's Avatar
 
Join Date: May 2006
Location: Charlestown, MA
Bikes: venerable surly crosscheck
Posts: 606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Squares open up your crank options considerably.
soze is offline   Reply With Quote
Old 12-28-06, 07:05 PM   #5
sivat
Geek Extraordinaire
 
sivat's Avatar
 
Join Date: Feb 2006
Location: Long Beach, CA
Bikes: Bianchi Advantage Fixed Conversion; Specialized Stumpjumper FS Hardtail
Posts: 1,769
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Like the other 2 said, square taper is better for single-speed and fixed. Square taper bbs are available in just about any length from 103mm to 120mm. Somewhere in there you will find a length that will put you within 2mm or so of a perfect chainline. Since splined bbs are available in only 1 or 2 (depending on the kind) lengths, you just have to hope the chainline will be close.

As for which works better in general, without looking at adjustability, square taper has been around for years and is only recently being replaced by external bearings. It works well, lasts a long time, and is easy to install. There have been complaints that some of the spline designs tend to loosen over time.
__________________
I'd rather have a bottle in front of me than a frontal lobotomy.

Sintesi Conversion Serotta Track
sivat is offline   Reply With Quote
Old 12-28-06, 09:46 PM   #6
trackstar10
elite
 
Join Date: Oct 2006
Location: seattle, wa
Bikes: track, road, cross, fixie
Posts: 516
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
square taper all the way. even campy knows this and has been using it forever just because they know that the other designs suck. the new ultra torque is not necessarily better, its just the first bb thats been *invented* thats probably just as good as square taper.
trackstar10 is offline   Reply With Quote
Old 12-28-06, 10:18 PM   #7
wroomwroomoops
Sir Fallalot
 
wroomwroomoops's Avatar
 
Join Date: Jul 2006
Location: Helsinki, Finland
Bikes:
Posts: 5,275
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Lots of BBs and crancks for square-taper. As sivat very correctly said, the vast choice of widths will allow you to adjust the chainline straight.

When Shimano had the bright idea to go with Octalink, we had suddenly Octalink V1, then V2 and somewhere in that time, also ISIS. A LOT of interfaces all came out in a short time. Then it turned out that the bearings on those BBs lasted way shorter than with square taper (less space for bearings in the new cartridges), so they had to put them outside.

Feels like VHS vs Betamax all over again, in a way. Or HD-DVD vs Blue-Ray. I'll wait this one out, thank you very much. In the meantime, I standardized on square-taper.
wroomwroomoops is offline   Reply With Quote
Old 12-28-06, 10:44 PM   #8
sers
Senior Member
 
sers's Avatar
 
Join Date: Oct 2005
Location: Salem, MA
Bikes: Land Shark, Level Professional, Tsunami singlespeed, Giant Reign 1
Posts: 2,188
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
while i was reading up on the benefits of ceramic ball bearings, i came across an interesting little tidbit in a usenet thread that jobst brandt was frequenting. in general a high quality square taper bottom bracket has less bearing drag than a high quality external bearing bottom bracket. also, a square taper campy record was found to have less bearing drag than the fsa ceramic megaexo.

however, it seems that unless you're putting out pro peleton wattage, the bearing drag of quality components makes no effective difference.
sers is offline   Reply With Quote
Old 12-29-06, 03:08 PM   #9
Retem
Paste Taster
 
Retem's Avatar
 
Join Date: May 2006
Location: Sacramento, CA
Bikes: , Jury Bike, Moto Outcast 29, Spicer standard track frame and spicer custom steel sprint frame.
Posts: 4,392
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by sivat
Like the other 2 said, square taper is better for single-speed and fixed. Square taper bbs are available in just about any length from 103mm to 120mm. Somewhere in there you will find a length that will put you within 2mm or so of a perfect chainline. Since splined bbs are available in only 1 or 2 (depending on the kind) lengths, you just have to hope the chainline will be close.

As for which works better in general, without looking at adjustability, square taper has been around for years and is only recently being replaced by external bearings. It works well, lasts a long time, and is easy to install. There have been complaints that some of the spline designs tend to loosen over time.

I have to say that the adjustable chainline on my isis plat track bb is very nice dialed that thing in dead silent
Retem is offline   Reply With Quote
Old 12-29-06, 03:29 PM   #10
james_swift
All ur bike r belong Enki
 
james_swift's Avatar
 
Join Date: Aug 2005
Location: San Fransicko
Bikes:
Posts: 816
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's hip(ster) to be square (taper). Couldn't resist.
james_swift 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 11:19 AM.