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 12-24-12, 06:07 PM   #1
VaultGuru
Senior Member
Thread Starter
 
VaultGuru's Avatar
 
Join Date: Aug 2004
Location: Fair Oaks,CA
Bikes: Kestrel RT1000 & Calfee Tandem
Posts: 733
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quill stem size/measurement question

I am changing out a quill stem on an older bike for a friend. The current stem diameter is 1 1/8" (28.53mm) and the headset is also 1 1/8". I ordered a new Profile quill stem in a 1 1/8" size. The packaging clearly states it is 1 1/8" diameter stem, yet the actual stem diameter measurement is 1" (25.18mm). I called the company I purchased the stem from, and they told me to just tighten the quill bolt and the slack would be taken up by the tapered end. I did so, but I am seeing 1/16" gap on both sides. This sure doesn't seem logical to me, but I haven't played around with a quill stem for years. Is this really the way it is supposed to fit?
VaultGuru is offline   Reply With Quote
Old 12-24-12, 06:42 PM   #2
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: 29,108
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
A nominal 1-1/8" quill stem has an actual quill OD of 1" (25.4 mm) since it goes inside a 1-1/8" OD fork steerer. A threadless stem has an opening that is truly 1-1/8" ID since it goes outside of the steerer. I wonder if the original stem quill you measure at an actual 1-1/8" OD is for a rare nominal 1-1/4" steerer.
HillRider is offline   Reply With Quote
Old 12-24-12, 09:14 PM   #3
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 30,824
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 857 Post(s)
+1, Quill stems are sized based on what they fit, not what they are. 1-1/4" steerers (take a 1-1/8") stems are extremely rare, and you may have difficulty finding one. If you think you've found one, be sure to cross examine the seller to make sure that you're getting a stem with an OD of 1-1/8" for a 1-1/4" steerer.

If you can't find a stem you're best option is to find or make a shim with a 1/16" wall to reduce the ID of your fork to 1". Even then the stem selection will be limited since 1-1/8" steerers were introduced about the same time as threadless headsets, so 1" threadless and 1-1/8" threaded are both fairly rare (but not nearly as rare as what you have).
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 12-25-12, 08:14 PM   #4
VaultGuru
Senior Member
Thread Starter
 
VaultGuru's Avatar
 
Join Date: Aug 2004
Location: Fair Oaks,CA
Bikes: Kestrel RT1000 & Calfee Tandem
Posts: 733
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the response HillRider and FB. The bike is one of the original Fischer mountain bikes and is about 24 years old. The stem is probably a proprietary Fischer stem. It probably is a 1-1/4. Will have to hunt around for one.
VaultGuru is offline   Reply With Quote
Old 12-25-12, 08:37 PM   #5
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 30,824
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 857 Post(s)
A bit of history. When 1-1/8" came out Gary Fischer figured he'd go one better and brought out 1-1/4. As I said earlier, threadless came out at just about the same time, leaving 1-1/4" threaded twisting in the wind. Fischer only made these for a short while, then fell into line changing to 1-1/8" threadless.

If you can find the stem, and ever need a headset I still have a couple new ones left over.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY 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 PM.