Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Help with tapered steerer tube

Search
Notices
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.

Help with tapered steerer tube

Thread Tools
 
Search this Thread
 
Old 03-27-24, 12:57 PM
  #1  
roadfix
hello
Thread Starter
 
roadfix's Avatar
 
Join Date: May 2003
Location: Los Angeles
Posts: 18,697
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 195 Post(s)
Liked 117 Times in 53 Posts
Help with tapered steerer tube

First time dealing with a tapered steerer tube so please bear with me.
I want to swap out my crappy Suntour suspension fork for a rigid, suspension corrected mtb fork with a tapered steerer which I plan on ordering soon. Tapered steerer tubes are supposed to measure 1.5” at the crown but the tube on my fork is 40mm or about 1-9/16” wide, which is a tad wider than 1.5”.
Is this the standard?
roadfix is offline  
Old 03-27-24, 01:09 PM
  #2  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,095

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4210 Post(s)
Liked 3,875 Times in 2,315 Posts
generally the crown race seat has a slightly larger diameter then the rest of the steerer right above the seat.

Cane Creek's headset dimensional specs pages shows the 1.5" fork crown race seat to need a 39.75-39.85mm diameter. headset-identification-and-specification-guide.pdf (canecreek.com) Andy
__________________
AndrewRStewart
Andrew R Stewart is online now  
Likes For Andrew R Stewart:
Old 03-27-24, 01:11 PM
  #3  
grumpus
Senior Member
 
grumpus's Avatar
 
Join Date: Apr 2016
Posts: 1,236
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 501 Post(s)
Liked 435 Times in 334 Posts
Originally Posted by roadfix
First time dealing with a tapered steerer tube so please bear with me.
I want to swap out my crappy Suntour suspension fork for a rigid, suspension corrected mtb fork with a tapered steerer which I plan on ordering soon. Tapered steerer tubes are supposed to measure 1.5” at the crown but the tube on my fork is 40mm or about 1-9/16” wide, which is a tad wider than 1.5”.
Is this the standard?
That is the standard, I don't know why, but it is.
grumpus is offline  
Likes For grumpus:
Old 03-27-24, 01:19 PM
  #4  
roadfix
hello
Thread Starter
 
roadfix's Avatar
 
Join Date: May 2003
Location: Los Angeles
Posts: 18,697
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 195 Post(s)
Liked 117 Times in 53 Posts
Awesome, thank you!
So the crown race I pulled out of this fork should press fit most any 1.5” steerer …. .?
roadfix is offline  
Old 03-27-24, 01:50 PM
  #5  
grumpus
Senior Member
 
grumpus's Avatar
 
Join Date: Apr 2016
Posts: 1,236
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 501 Post(s)
Liked 435 Times in 334 Posts
Originally Posted by roadfix
Awesome, thank you!
So the crown race I pulled out of this fork should press fit most any 1.5” steerer …. .?
I think so, but I wouldn't bet the farm, because there's usually an oddball somewhere to make things complicated.
grumpus is offline  
Likes For grumpus:
Old 03-27-24, 04:45 PM
  #6  
veganbikes
Clark W. Griswold
 
Join Date: Mar 2014
Location: ,location, location
Posts: 13,525

Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26

Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 4357 Post(s)
Liked 3,995 Times in 2,666 Posts
Originally Posted by grumpus
I think so, but I wouldn't bet the farm, because there's usually an oddball somewhere to make things complicated.
There are zero oddballs in cycling. Nobody has even done anything proprietary and weird ever. Everything fits together perfectly all the time with zero issue ever. I don't know what you are talking about
veganbikes is offline  
Likes For veganbikes:

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



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.