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 01-21-09, 11:25 PM   #1
le'ehov
Senior Member
Thread Starter
 
Join Date: Apr 2007
Bikes:
Posts: 186
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
What size stem do I have?

How can I tell? Tried to measure the stem w/ no bar, but its hard to tell if its 25.4 or 26 because they are very close. I do have a dirty harry lever, and I use the shims, but where the clamp is it's wider.
Heres s ****ty picture, maybe itll help a little.

le'ehov is offline   Reply With Quote
Old 01-22-09, 02:10 AM   #2
mander
Senior Member
 
Join Date: Sep 2006
Location: Van BC
Bikes:
Posts: 3,744
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You need a set of Vernier calipers. A plastic set won't be more than $3 or $5. Through a simple but clever design, they allow you to accurately measure to a tenth of a mm and beyond. This is handy for cyclists as, as you know, lots of components are speced to dimensions that involve tenths of mms.



You use the pointy things on the top to measure the inside dimensions of holes like in your stem clamp. Or you could use the things on the bottom to measure the outside dimension of the middle section of your bars.

Last edited by mander; 01-22-09 at 02:17 AM.
mander is offline   Reply With Quote
Old 01-22-09, 02:27 AM   #3
sunburst
Senior Member
 
sunburst's Avatar
 
Join Date: Jan 2008
Location: NorCal - bay area
Bikes: giant, trek, peugeots, friday
Posts: 1,320
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Wow - learned something new. I went to Home Depot and spent $20 I think, for a set of dial calipers, that do not have that fine scale. I can not, for example, tell the difference between a 27.2 or 27.0 seatpost.

I'm ordering a set of these. Got a good reasonably priced source? This was what I got from google:
http://www.northerntool.com/webapp/w...3656_200303656

I even found a tutorial on how they work:
http://www.physics.smu.edu/~scalise/apparatus/caliper/

This is great stuff to know!

Last edited by sunburst; 01-22-09 at 02:34 AM.
sunburst is offline   Reply With Quote
Old 01-22-09, 02:49 AM   #4
mander
Senior Member
 
Join Date: Sep 2006
Location: Van BC
Bikes:
Posts: 3,744
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That set looks good to me. I got a set of six plastic ones for cad $8.50 or so at Lee Valley in Vancouver BC.

http://www.leevalley.com/wood/page.a...513,43546&ap=1

They're not as nice as the stainless ones; but there are six of them. : ) For cycling purposes they're great.

Someone later got me one of the cad $20 stainless Lee Valley sets. They're overkill for me but pretty awesome to have.

http://www.leevalley.com/wood/page.a...513,43546&ap=1

Analog Verier calipers are one of my favourite tools because they achieve such a high degree of measuring precision with so few moving parts.

Last edited by mander; 01-22-09 at 02:53 AM.
mander is offline   Reply With Quote
Old 01-22-09, 03:47 AM   #5
tFUnK
Senior Member
 
Join Date: Jun 2002
Location: Menlo Park, CA
Bikes: GT Forte Ti, GT GTR Carbon Sport, TCR C2, Ridley XBow, Specialized Tricross Sport, Specialized Langster, Xootr Swift
Posts: 2,310
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
sigh.. tell me i'm not the only one who stumbled into this thread and ended up picking up a set of calipers off ebay.
tFUnK is offline   Reply With Quote
Old 01-22-09, 04:03 AM   #6
philos
Senior Member
 
Join Date: Nov 2008
Bikes:
Posts: 111
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^^noope. I'm astonished too. We have a worthy thread!

I really enjoyed the visual presentation, what did you use to make it?
philos is offline   Reply With Quote
Old 01-22-09, 04:35 AM   #7
jewish_
n00b
 
Join Date: Jan 2009
Location: tacoma,wa
Bikes: old schwinns
Posts: 38
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
almost 100% sure it's a 25.4... My Schwinn had that stem and i threw some 25.4 risers on it and they fit perfectly so...

That bike have Sakae Custom components, correct?
jewish_ is offline   Reply With Quote
Old 01-22-09, 08:07 AM   #8
mander
Senior Member
 
Join Date: Sep 2006
Location: Van BC
Bikes:
Posts: 3,744
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by philos View Post
^^noope. I'm astonished too. We have a worthy thread!

I really enjoyed the visual presentation, what did you use to make it?
gis : )
mander is offline   Reply With Quote
Old 01-22-09, 09:54 AM   #9
jdms mvp
Senior Member
 
Join Date: Jun 2007
Location: four 1 OHHH , Maryland
Bikes: nagasawa, fuji track pro
Posts: 2,812
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
what kind of risers are they....

if those are nitto b201aa then the bars themselves are 25.4
jdms mvp is offline   Reply With Quote
Old 01-22-09, 11:47 AM   #10
Steev
Senior Member
 
Steev's Avatar
 
Join Date: Jul 2005
Location: Backwoods of Ontario
Bikes:
Posts: 2,150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Look around near the clamp area of the bars. Some manufacturers are nice enough to emboss the size right on the bar.
Steev is offline   Reply With Quote
Old 01-22-09, 11:51 AM   #11
arborohs
Senior Member
 
Join Date: Jan 2007
Location: Walnut, CA
Bikes:
Posts: 174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
never was a sr custom that was 26.0
arborohs is offline   Reply With Quote
Old 01-22-09, 11:54 AM   #12
le'ehov
Senior Member
Thread Starter
 
Join Date: Apr 2007
Bikes:
Posts: 186
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Not sure about the bars, bought them from some old man with a garage full of parts galore, liked the color.
The components are not original, not sure what company makes the custom, but I guess its sakae according to arborohs.
le'ehov is offline   Reply With Quote
Old 01-23-09, 08:10 AM   #13
LeCollectif
Senior Member
 
Join Date: Jul 2008
Location: Vancouver, BC
Bikes:
Posts: 222
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Correct me if I'm wrong here, but aren't most 1" quill stems equipped with a 25.4mm clamp? Seems to be the only spec I see for them these days.
LeCollectif is offline   Reply With Quote
Old 01-23-09, 02:25 PM   #14
Steev
Senior Member
 
Steev's Avatar
 
Join Date: Jul 2005
Location: Backwoods of Ontario
Bikes:
Posts: 2,150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by LeCollectif View Post
Correct me if I'm wrong here, but aren't most 1" quill stems equipped with a 25.4mm clamp? Seems to be the only spec I see for them these days.
Not really. There is a de-facto "Italian" standard for road bikes that is 26mm, then there are the old Cinellis that used a propriety standard of 26.4mm. Mountain bikes used 25.4mm. Nowadays everyone seems to be going to 31.8mm for road and mountain bikes.
Steev is offline   Reply With Quote
Old 01-23-09, 05:21 PM   #15
delegado zero
on my scraper bike
 
delegado zero's Avatar
 
Join Date: Mar 2008
Location: las vegas, nv
Bikes: KHS Summit, all others gone...
Posts: 59
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I just sold a bike with a sakae custom stem and bars, it was 25.4
delegado zero 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 02:57 PM.