Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Mon Sep 26, 2016 1:20 am
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 10 posts ] 
Author Message
PostPosted: Wed Mar 27, 2013 6:15 pm 
Offline
User avatar

Joined: Wed Oct 31, 2007 10:32 pm
Posts: 8335
Location: Los Angeles / Glendale, California
I suppose this question could have easily ended up in any of our subforums (road, cx, mtb) but I'll ask it here:

Has anyone managed to modify a crown race so it places the lower headset bearing closer to the crown on a traditional (non-integrated) fork?
Or does anyone know of a modification that was done in a way to have the same result?

The angled portion of the crown race would stay the same - that's the only part that really engages with the bearing. The portion below the angled bit would be decreased in thickness substantially, thereby brining the bearing much closer to the fork's crown.

Thoughts welcome.

_________________
Exp001 || Other projects in the works.


Top
   
PostPosted: Wed Mar 27, 2013 6:44 pm 
Offline

Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2196
Location: Santa Cruz, California, USA
All the crown races I have seen have been very short, with no room to make them shorter. Admittedly it's been a while since I looked at an external headset.
But it seems like it'd be easier to find a shorter one with the appropriate bearing seat dimensions than to get a tall one machined down.


Top
   
Posted: Wed Mar 27, 2013 6:44 pm 


Top
   
 
PostPosted: Wed Mar 27, 2013 6:59 pm 
Offline
User avatar

Joined: Wed Oct 31, 2007 10:32 pm
Posts: 8335
Location: Los Angeles / Glendale, California
Thanks, I'll do some searching for matches.

I wasn't thinking about machining per se, but that is an option. I was thinking I can just re-build one with a shorter height and have it printed up. A little costly, but at least it will be pure aluminum (or titanium if I want)

_________________
Exp001 || Other projects in the works.


Top
   
PostPosted: Wed Mar 27, 2013 7:03 pm 
Offline

Joined: Fri Oct 28, 2011 3:25 am
Posts: 1318
Location: United Kingdom of Great Britain and Northern Ireland
To what end? You could cut the fork crown instead, depending on what the crown is like.


Top
   
PostPosted: Wed Mar 27, 2013 7:41 pm 
Offline

Joined: Tue Dec 23, 2008 2:57 pm
Posts: 823
Location: NYC
prendrefeu wrote:
... thereby brining the bearing much closer to the fork's crown.
.



To what end? What is ur objective and why? EM3

_________________
______________

My 2013 Cervelo R5


Top
   
PostPosted: Wed Mar 27, 2013 8:00 pm 
Offline
User avatar

Joined: Wed Oct 31, 2007 10:32 pm
Posts: 8335
Location: Los Angeles / Glendale, California
The objective is aesthetics.

_________________
Exp001 || Other projects in the works.


Top
   
PostPosted: Wed Mar 27, 2013 8:31 pm 
Offline

Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2196
Location: Santa Cruz, California, USA
A good machinist (not me) could shorten it on a lathe, but might need to make some tooling to hold it first.


Top
   
PostPosted: Thu Mar 28, 2013 3:12 pm 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
Traditional fork, is the headset and frame traditional as well? Or is it an IS headset?


Top
   
PostPosted: Thu Mar 28, 2013 3:40 pm 
Offline
User avatar

Joined: Wed Oct 31, 2007 10:32 pm
Posts: 8335
Location: Los Angeles / Glendale, California
Traditional frame/headtube (external type headset) (aka 'ahead')
Fork designed for internal headset: the diameter of the crown is longer than traditional.

That (the diameter difference) is a separate issue: I may end up having to make my own lower cup to match things aesthetically.
However I've noticed that traditional headset/fork interfaces were designed to be o.k. with the space created by the crown race.
On integrated/internal, it seems that the headtube somewhat masks the space a bit, making it very slim (1mm gap or less between headtube and fork, much more aesthetically pleasing).

:noidea: Maybe I should look into other headsets.

_________________
Exp001 || Other projects in the works.


Top
   
Posted: Thu Mar 28, 2013 3:40 pm 


Top
   
 
PostPosted: Thu Mar 28, 2013 5:29 pm 
Offline
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
Location: NoVA/DC
If you're using a campy-fit crown on an IS-spec bearing (even if that bearing is in external cups), the for Lo will sit tall. I doubt this is the case but it's worth looking into. If the crown were to, say, be pressed upside-down, it may fit in a lathe that way and have access to the bottom of the race to cut it away. Then all you need is the lathe.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 10 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Felt AR1 frameset - No crown race

in Road

Skipper

6

445

Mon Nov 30, 2015 10:11 pm

thepainandsuffering View the latest post

There are no new unread posts for this topic. Fuji SL 2017 fork steerer crown race??

in Road

Allen254

6

187

Wed Sep 21, 2016 5:47 am

Allen254 View the latest post

There are no new unread posts for this topic. Need a lower headset top cap?

in Road

wheelsONfire

1

434

Tue Jan 05, 2016 3:12 am

danbjpa View the latest post

There are no new unread posts for this topic. CAAD 10 Lower Headset Bearing

in Road

OliverRB

10

605

Thu Feb 25, 2016 1:14 am

Lincs View the latest post

There are no new unread posts for this topic. Tuning a Dura Ace SRM for lower weight

in Road

jamesbass

8

820

Tue Nov 03, 2015 6:33 pm

sadisticnoob View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Baidu [Spider], BeeSeeBee, BRM, ncrider, Yahoo [Bot] and 27 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited