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 11-17-10, 02:12 PM   #1
SactoDoug
Senior Member
Thread Starter
 
SactoDoug's Avatar
 
Join Date: Oct 2010
Location: Sacramento, CA
Bikes: 2010 Bottecchia CF67, 1991 BCA CitiCross, 1998 Mongoose Mountain Bike
Posts: 445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Threaded to Threadless Fork Steerer Length?

I am about to convert from a threaded fork to a threadless one. The thing that is really throwing me now is the steerer length. I see people listing forks already cut from 200mm to 300mm. I understand that I can cut it down further if needed.

Is there a "standard" length that will work? How would I measure it to determine what I need for my frame?
SactoDoug is offline   Reply With Quote
Old 11-17-10, 02:39 PM   #2
Cynikal
Team Beer
 
Cynikal's Avatar
 
Join Date: Apr 2004
Location: Sacramento CA
Bikes: Too Many
Posts: 5,921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Everytime I install a new fork I don't cut it until I get the fit correct. You can always add spacers above the fork there is no functional reason not to, just aesthetic.
Cynikal is offline   Reply With Quote
Old 11-17-10, 03:09 PM   #3
blamp28
Bikaholic
 
blamp28's Avatar
 
Join Date: Dec 2006
Location: Western, Michigan
Bikes: Trek Fuel 90, Giant OCR, Rans Screamer Tandem
Posts: 1,465
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Measure your head tube to get a rough Idea. Remember that you will have the headset height as well as the stem height to account for. I would make sure to buy at least enough lenght to be comfortably over those two. You can cut if you want later.
blamp28 is offline   Reply With Quote
Old 11-17-10, 04:12 PM   #4
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You need to know how high you want your handlebars. The steerer tube needs to be long enough to reach from the fork crown to 1/8 inch below the top of the threadless stem. And it would be best that the steer tube is even longer so that it can be cut after you've had a chance to try the setup. Be sure you buy a fork and headset of the correct steer tube diameter to match your frame.
Al1943 is offline   Reply With Quote
Old 11-17-10, 04:16 PM   #5
DaveSSS
Senior Member
 
Join Date: Sep 2008
Location: Loveland, CO
Bikes: Two LOOK 585s, one KG461
Posts: 4,987
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Add your head tube length, 25-35mm for the headset, 40mm for the stem and a maximum of 40mm for spacers. That should be long enough.
DaveSSS is offline   Reply With Quote
Old 11-17-10, 05:00 PM   #6
SactoDoug
Senior Member
Thread Starter
 
SactoDoug's Avatar
 
Join Date: Oct 2010
Location: Sacramento, CA
Bikes: 2010 Bottecchia CF67, 1991 BCA CitiCross, 1998 Mongoose Mountain Bike
Posts: 445
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I know what to measure now.

Thanks for the input.
SactoDoug is offline   Reply With Quote
Old 11-17-10, 05:08 PM   #7
cyclist2000
Senior Member
 
cyclist2000's Avatar
 
Join Date: Sep 2009
Location: Up
Bikes: Masi (retired), Giant TCR, Eisentraut, Jamis Aurora Elite, Zullo (trainer bike), Cannondale, 84 Stumpjumper, Waterford(N+1), Tern D8 (N+1), looking for a Ti frame
Posts: 3,036
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't cut because I want the flexability for future needs.
cyclist2000 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 09:26 AM.