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

Tricolor headset crown race caput

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.

Tricolor headset crown race caput

Reply

Old 12-04-17, 05:23 PM
  #1  
reissue59
Senior Member
Thread Starter
 
Join Date: Dec 2014
Posts: 87
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Tricolor headset crown race caput

What others are compatible?
Tried a dura ace from same period but there is a little play to the fork when everything is installed and tight
reissue59 is offline  
Reply With Quote
Old 12-04-17, 09:56 PM
  #2  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,160

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1600 Post(s)
Tri color is not a specific model ID. Did you mix brand/models of headset parts? The text short post is lacking much detail. Andy
Andrew R Stewart is offline  
Reply With Quote
Old 12-04-17, 10:02 PM
  #3  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 36,049

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

Mentioned: 121 Post(s)
Tagged: 1 Thread(s)
Quoted: 4327 Post(s)
You can get a decent sense of compatibility by assembling the races and balls in the palm of your hand, or with one on the bike, but no fork.

If the fit feels right, meaning the races are flat against each other and the balls are running on the races. A bad fit will want to cam or shift sideways and will be obvious.

If the bearing assembly is OK, then it's likely an issue of something else, possibly a sloppy fit between the race and fork (since that's the only part you changed).
__________________
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 12-05-17, 08:30 AM
  #4  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 19,903

Bikes: Several, mostly not name brands.

Mentioned: 91 Post(s)
Tagged: 0 Thread(s)
Quoted: 1495 Post(s)
"Tricolor" is not an official product designation, just a popular nickname for a cosmetic variant of the Shimano 600 product line. I suspect that other Shimano 600 or Ultegra, or even Dura-Ace crown races might work.
JohnDThompson is offline  
Reply With Quote
Old 12-05-17, 12:49 PM
  #5  
maddog34
Senior Member
 
maddog34's Avatar
 
Join Date: Jul 2015
Location: NW Oregon
Posts: 1,391

Bikes: !981 Trek 930R Custom, Diamondback ascent with SERIOUS updates, and a trek 6700 with updates

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 551 Post(s)
https://www.ebay.com/itm/Shimano-600...MAAOSwridaEcs1

they're getting scarce.... another possible source is a co-op/recycler bike shop... we keep boxes of spare pieces around, you might get lucky and locate a suitable part... take the old one along to compare... the very minor differences in crown races are endless and difficult to eyeball, so a digital caliper would be advised, eh?

often, crown races get forgotten on the fork when the fork gets bent in a crash... this makes them a rare commodity in the used stuff world...
maddog34 is offline  
Reply With Quote
Old 12-05-17, 05:49 PM
  #6  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 19,903

Bikes: Several, mostly not name brands.

Mentioned: 91 Post(s)
Tagged: 0 Thread(s)
Quoted: 1495 Post(s)
Originally Posted by maddog34 View Post
often, crown races get forgotten on the fork when the fork gets bent in a crash... this makes them a rare commodity in the used stuff world...
Crown races are also the fastest wearing part of any headset, which contributes to their scarcity in the used market.
JohnDThompson is offline  
Reply With Quote
Old 12-05-17, 06:19 PM
  #7  
maddog34
Senior Member
 
maddog34's Avatar
 
Join Date: Jul 2015
Location: NW Oregon
Posts: 1,391

Bikes: !981 Trek 930R Custom, Diamondback ascent with SERIOUS updates, and a trek 6700 with updates

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 551 Post(s)
Originally Posted by JohnDThompson View Post
Crown races are also the fastest wearing part of any headset, which contributes to their scarcity in the used market.
and then, there's that annoying oxidizer, Water... rust pitting on crown races is the top reason most old school headsets get replaced, IME.
maddog34 is offline  
Reply With Quote
Old 12-05-17, 08:39 PM
  #8  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,160

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1600 Post(s)
Originally Posted by maddog34 View Post
and then, there's that annoying oxidizer, Water... rust pitting on crown races is the top reason most old school headsets get replaced, IME.

As I tried to say in another thread recently. Andy
Andrew R Stewart is offline  
Reply With Quote
Old 12-07-17, 02:41 AM
  #9  
Dave Mayer
Senior Member
 
Join Date: Dec 2006
Posts: 1,697
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 527 Post(s)
You possibly installed a JIS crown race on an ISO fork.

What was wrong with the original crown race? Even if it is very pitted, it can be revived by throwing away the ball bearing retainer, and installing a greater number of loose balls in the bottom cup.

That way, the new balls cannot line up with the pits, which is the cause of indexing steering. Sounds crude, but this works amazingly well.
Dave Mayer is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service