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-   -   Threads on bottom of steerer tube? (https://www.bikeforums.net/general-cycling-discussion/1156921-threads-bottom-steerer-tube.html)

marcs34 10-01-18 06:01 PM

Threads on bottom of steerer tube?
 
I am trying to put together my first bike and am having a problem installing the fork. Where the steerer tube meets the crown there are threads. How do I put crown race on with these there? Do I file them off?




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Tamiya 10-01-18 06:25 PM

Umm... what parts are you trying to mix, are they MEANT to mate with each other?
Old style headset has big nut on top that goes on the threaded tubevsAhead style newer design stem that clamps on onto threadless stem Afaik there are adapters available to allow one to swing either way.But filing threads anything will make diameter smaller & I can't ever handfile anything perfectly round, that's why I'd love owning a lathe... etc etc

dedhed 10-01-18 06:49 PM

You need to give people more information. What kind of fork? threaded, threadless? 1" 1.25"? Threaded headset? threadless? Internal? Integrated?

marcs34 10-01-18 06:50 PM

Forks and headset bought separate. Forks are Jinguo brand. threadless. 1"
Headset Ginyea. Threadless headset. Semi-integrated.

Homebrew01 10-01-18 07:03 PM

Is the steerer threaded & glued into the fork crown ?? So extra threads are exposed ?

dedhed 10-01-18 07:04 PM

Have you measured it? The crown race should have an interference fit. Are they threads or just ridges?

1.125" threadless steerer.
  • Fork crown race ID: 30.0mm
  • Fork crown seat OD acceptable range: 30.1mm to 30.2mm

marcs34 10-01-18 07:19 PM


Originally Posted by Homebrew01 (Post 20595432)
Is the steerer threaded & glued into the fork crown ?? So extra threads are exposed ?


Threads appear to be part of fork crown, not part of steerer.

marcs34 10-01-18 07:39 PM


Originally Posted by dedhed (Post 20595433)
Have you measured it? The crown race should have an interference fit. Are they threads or just ridges?

1.125" threadless steerer.
  • Fork crown race ID: 30.0mm
  • Fork crown seat OD acceptable range: 30.1mm to 30.2mm

They look like threads. Do some crown races fit over ridges?

MikeyMK 10-03-18 09:00 PM

Photo?

jitenshajin 10-04-18 02:37 AM

As they say, "a photo is worth a thousand words."

marcs34 10-08-18 05:32 AM


Originally Posted by MikeyMK (Post 20599029)
Photo?

The page wasn't letting me post a photo without 10 previous posts.

mstateglfr 10-08-18 07:48 AM


Originally Posted by marcs34 (Post 20595301)
I am trying to put together my first bike and am having a problem installing the fork. Where the steerer tube meets the crown there are threads. How do I put crown race on with these there? Do I file them off?

Threaded steerer down at the fork crown?
that's a new one.

post more to get to 10 and then get a pic on here

marcs34 10-08-18 03:03 PM

ok

fietsbob 10-08-18 03:06 PM

more options
 
you can find a 3rd party host, of your picture, then post a link, to that place,
rather than the picture, here.


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